Author Archives: admin

Lithium-Ion / Li-ion Cordless Tools Batteries Features

Lithium-ion (Also called Li-ion) is a family of rechargeable battery types boasting one of the best energy densities, no memory effect, and a slow loss of charge when not in use. Because of these features, the Li-ion battery powered cordless tools are designed more and more.

Let us know more about these features.

No Memory Effect

Memory effect is the problem that (it’s alleged) nickel cadmium rechargeable has whereby they hold less and less charge, depending on use. For example, if a ni-cad battery is not fully discharged, the theory goes that the battery “remembers” that it’s got a smaller capacity for charge than the manufacturer intended.

This means, after charge–by-charger, the ni-cad battery will be less and less efficient.

More lighter

For example, a Li-ion 18V 3.0Ah Makita BL1830 battery is about 650 g, but a Ni-MH 18V 3.0Ah Bosch BAT026 is 1200 g, In the same voltage and capacity, the Ni-MH battery is nearly twice of the weight of the Li-ion battery.

This is great when you are using a cordless power tools above shoulder height for any length of time.

High energy density

The energy density of lithium-ion is typically twice that of the standard nickel-cadmium. There is potential for higher energy densities. The load characteristics are reasonably good and behave similarly to nickel-cadmium in terms of discharge. The high cell voltage of 3.6 volts allows battery pack designs with only one cell. Most of today’s mobile phones run on a single cell. A nickel-based pack would require three 1.2-volt cells connected in series.

Low Self-discharge rate:

A lithium-ion cell is that their rate of self-discharge is much lower than that of other rechargeable cells such as Ni-Cad and Ni-MH forms. You do not need to charge it again after a long time of use, this can save time when you have something urgent to do.

Share Button

The Top 5 Li-ion Battery powered Cordless Jig Saw

Nowadays, there are more and more Cordless power tools use Li-ion battery, why? The reason is Li-ion battery (Also called Lithium-ion Battery) is lighter than Ni-CD and Ni-MH battery, but I think, the main reason is Li-ion battery is more environmental and can the same or more power than Ni-CD and Ni-MH battery.

So, let’s recommend five Li-ion Battery powered Cordless Jig Saw to you.

First one: Bosch JSH180BL Jig saw

The feature of Bosch JSH180BL Jig saw is as below:

Up to 30% lighter weight than leading competitor;
Up to 10% smaller than leading competitor;
1 Handed blade insertion and ejection offers most convenience and ease of use;
Smallest grip diameter reduces user fatigue during extended use applications;
Always-on dust blower helps keep intended cut line visible;
On-board tool storage for more convenience;
Adjustable footplate for bevel cuts up to 45°;
Battery and charger sold separately.

Second one: Dewalt DCS331B Max Li-Ion Cordless Jig Saw

You can see the feature of Dewalt DCS331B Max Li-Ion Cordless Jig Saw below:

Accurate and versatile tool allows you to make a wide range of cuts in many different materials;
All-metal lever-action keyless blade change makes blade changes quick and easy;
Variable speed control allows you to cut as fast as you need, between 0 – 3,000 SPM.

Further more, this is 20V jig saw can use the 18V battery, this is not know by many people, so you have two choice in Dewalt DCS331B batteries.

Third one is a Makita BJV180 18-Volt LXT Lithium-Ion Cordless Jig Saw

It used Makita-built variable speed motor delivers 0-2,600 strokes per minute for fast and efficient cutting.

3 orbital settings plus straight cutting for use in a wide range of materials;
Designed with convenient features such as a built-in L.E.D. light to illuminate the work area and a “tool-less” blade change system for more productivity;
Makita LXT Lithium-Ion battery and Energy Star rated 30-Minute Rapid Optimum Charger produces 430% total lifetime work with 2.5X more cycles;
3-year warranty on tool; 1-year warranty on batteries and charger.
“Tool-less” blade change system allows for faster blade installation and removal for increased productivity;
Large 2-finger variable speed trigger for added convenience;
Heavy gauge, precision machined base for smooth, accurate cutting and added durability;
Built-in L.E.D. light illuminates the work area.

Fourthly: Skil 4570-01 18V Cordless Lithium-Ion Orbital Jigsaw

The SelectSystem allows the tool to be powered by either Lithium-Ion and Ni-Cd batteries

Built-in work light for better visibility and accuracy;
Orbital cutting action cuts through both metal and wood;
Simple and safe quick-release blade changes;
Compatible Skil Ni-Cd batteries: SB18A and SB18B;
Compatible with Skil Ni-Cd Charger: SB118;

The last of five is Milwaukee M18™ Cordless LITHIUM-ION Jig Saw

It used the QUIK-LOK™ Blade Clamp- Provides fast and easy keyless blade change.
Tool Free Shoe Bevel with Positive Stops- Allows for quick and accurate shoe adjustment. The tool free shoe bevel with positive stops allows for a maximum 45 degree bevel in either direction with detents at 0, 15, 30, and 45 degrees;
Position Orbital Cutting-Milwaukee 5-position orbital cutting offers the most versatility for application specific cutting than any cordless jig saw on the market;
Over-Molded Grip with Variable Speed Trigger- Provides optimal control for cutting a variety of materials;
Non-Marring Shoe- Protects the work surface from damage.

So, this is the top 5 of Li-ion Battery powered Cordless Jig Saw, which do you prefer? Don’t forget to let us know.

Share Button

What is SDS drill mean and the functions

When buying a new cordless or corded drill, you can find that there is a drill called SDS. So, do you know what a SDS drill is? What you can make benefit for it, and compared to other drills, what is advantage of a SDS drill? Let me show you.

What does SDS means?
The SDS means Special Direct System, so a SDS drill is a Special Direct System drill.

The SDS drill is improved hammer action which allows more powerful hammer blows .The hammer works with specifically designed SDS drill bits which results in better performance when drilling through hard materials such as concrete.

When will you need a SDS drill?
Because the SDS drill have more power, so, if you want more power for demanding and heavy duty jobs, such as bore holes in stones or concrete. Because it has a shank and drill bits that is attached to the drilling hammer, it is mostly used in masonry.

Functions of SDS drill
They have three fundamental functions that permit normal drilling, hammer action and chiseling. In addition, SDS Drills can grip large diameter drill bits well pass the 13mm diameter boundary of normal drills.

Difference between normal drills
SDS drill is able to deliver hundreds of times the energy per hammer when conventional hammer drill can not. It also has a different chuck design and special SDS drill bits to remove the possibility of bit slip and also to withstand the force of its hammer action.

SDS Drills are usually heavy compared to normal drills which mean they are inappropriate when operating up a ladder.

So, a SDS drill need more power, such as the Dewalt 18V DC212 SDS Rotary Hammer Drill, Dewalt 24V DW005 SDS Cordless Rotary Hammer Drill, Bosch GBH 36V-Li Compact SDS Hammer Drill, Makita BHR261TRDE 36v LXT BHR261RDE Cordless SDS Hammer and the Makita 18V LXT BHR202 BHR202Z BHR202RFE SDS Hammer Drill which use BL1830 battery.

We suggest buying a high capacity battery for this SDS drill, 3000mAh is ok. More higher will be great.

Share Button

Guides on how to repair cordless hammer for novice

As a power tool repair novice, the first repair maintenance of cordless power tools is the cordless Hammer. Here are some points of personal summary for repairing a cordless hammer:

1. Check the hammer battery is OK or not.

2. The first step is to observe the repair hammer, to see if the shape of the hammer is incorrect observation or huge damage, if damaged, may be inferred fault the place and reason.

3. Measured the Hammer with a millimeter to see if the lines breaks or not, because Hammer entire circuit is a series circuit, you can check through multiple measurements to find out which part of the Hammer is fault.

4. You should be more carefully when demolition the hammer. Please put the disassemble parts, screws and other accessories into a fixed position to prevent those little parts in the repair process is lost, concentrate on at the line connection for easy installation and the maintenance is completed ( the main point is to develop good maintenance habits, in the maintenance of large motor when not so confused ).

5. Do more test, hammer repaired after topical use tables to test whether pathways, the replacement or repair of the motor rotor when the direction of rotation of the motor to be tested to ensure the hammer is not reversed. If the rotor is inverted to change the direction of current coil.

6. After installation and maintenance, will be re-tested and wipe clean the machine, so that customers can get our hands after having a good feeling.

Share Button

Functions and purpose of 28 normal power tools

1. Li-ion Cordless Screwdriver / Cordless Screwdriver: Suitable for transfer, turn out the screw, metal, ceramic and plastic drilling.

2. Cordless impact Drill: Suitable for transfer, turn out the screw. Also in wood, metal, ceramic and plastic drilling, or brick, concrete and stone on the impact drilling.

3. Cordless Wrench: Suitable for transfer, turn out the screws within the specified dimensions, can also be used to tighten, loosen Screw nut within the specified dimensions.

4. Cordless Hammer: Suitable for brick, concrete and stone on the impact drilling. There is also in wood, metal, ceramic and plastic drilling. When model equipped with electronic speed turn prepare and forward / reverse function, it can also loose / tighten screws and tapping.

5. Drill: Suitable for use in plastics, ceramics, metal and wood drilling operations. When equipped with electric control device and forward / reverse function, it can rotate and drill thread.

6. Impact Drill: Suitable for brick, concrete and stone on the impact drilling. It may also be in wood, metal, ceramic and plastic drilling. When equipped with electronic speed and forward / reverse function, it can also be used to loose / tighten screws and tapping.

7. Hammer drill: in concrete, brick and stone on the vibration drilling operations. When the vibration drilling function closed, you can use the machine in wood, metal, ceramic and plastic drilling, equipped with electronic speed control device and forward / reverse switch brick machine, can be transferred in / out threaded screws or drill with chisel cut function of the model, can do the hammer hits the job.

8. Hammer: Suitable for use in concrete, brick, stone and asphalt on chiseling operation, if installed on the appropriate accessories, you can also use the machine to screw or knock the loose solid materials to Solid.

9. Angle grinder: suitable for cutting, grinding and brushing metal and stone, the job must not use water, when cutting stone must be used to guide plate. For models equipped with an electronic control device. If installed with suitable accessories, it can also be used at abrasive and polishing operations.

10. Polishing machine: Suitable for polishing metal and stone.

11. Direct mill: (After installing the emery wheel) suitable for grinding metals and remove burrs. When equipped with an electronic speed control device and operating at low speed state, it can also be installed on the machine brushes, fan-shaped grinding wheel and abrasive belt.

12. Electric screwdriver: For Transfer to / from the screw, but also in wood, metal, ceramic and plastic drilling.

13. Tapping Machine: Suitable for through hole tapping. When special accessories installed, you can perform a blind hole tapping.

14. Impact Wrench: For Transfer to / from the screw within the specified dimensions, but also to tighten / loosen the nuts within the specified dimensions.

15. Metal electric scissors: for shear iron does not produce chips. You can shear curves and straight lines.

16. Straight electric scissors / electric punching: suitable for cutting sheet metal, sheet metal shears after not distorted. Shear can be straight, narrow bore cutting and cutting corners.

17. Miter saw: in the timber on the vertical and horizontal straight line separatism separatist.

18. Profile cutting machine: metal plate made in vertical and horizontal line cutting, cutting without the use of water.

19. Stone cutting machine: Suitable in the high mineral materials (e.g. marble) grooved seam or cutting, be sure to operate the machine a solid bench, and you want to use a protective cover, with a special configuration of the model can also be subjected to wet cut, not using this machine for cutting wood, plastic or metal.

20. Wall slot machine: equipped with guided slide, suitable for use in a high mineral content of the material (e.g. reinforced concrete, brick walls and asphalt, etc.) on a cutting or milling, slot milling time without water.

21. Jig Saw: Suitable end of the fixed pad for cutting wood, plastic, metal, ceramic plate and rubber. Cutting saws can also be cut saws straight bevel (45 degree angle).

22. Circular saw: for a solid working platform sawing work, can be vertical, horizontal or diagonal line sawing, sawing bevel sawing maximum angle of 45 degrees.

23. Latex cutting machine: You can use this machine in the foam plastic, foam rubber and similar materials on a wide variety of shapes cut. )

24. Sanding machine / trimmer / planer: Suitable for wood, plastic, caulking material and protect the paint on the surface of dry grinding operations. With electric adjustment function, it can also do the polishing operations.

25. Hot air gun: used to bend or welding plastics, remove the old paint and pipe for thermal heating, in addition, you can use this machine for welding, tin, welding glue and thaw pipes.

26. Wall detector: Can detect metal, wire, wood and other various materials.

27. The laser range finder: to measure distance, area and volume, can indirectly measure the height)

28. Laser level: the measuring instrument for measuring and testing the horizontal and vertical lines.

Share Button

How to calculate the number of cells in a Li-ion cordless power tool battery

In my last article, we know how to calculate cells in Li-ion laptop battery, and what a 18650 battery cell is. And, let learn How to calculate the number of cells in a Li-ion cordless power tool battery.

It is known that the Li-ion Cordless tool battery is also made by 18650 battery cell. So, it is very easy to calculate the number of cells in a Li-ion power tools.

For example, the Makita BL1830 Battery, it is a 18 V, 3000mAh battery. How many cells in it? Let’s calculate it.

To make the voltage to 18 V, it needs 5 series of 3.6 V cell, and to make capacity to 3000mAh, it needs 2 parallels of 1500mAh cell. So, the total of a 3000mAh Makita BL1830 battery is 5*2 = 10 cells.

But, some people may say, why not use a 3.6 V 3000mAh battery cell to build it? The reason is, power tools is heavy duty machine, it need much more power than the nomal laptop battery, so the density of the chemistry material is much more than laptop battery cell. It is hard to do it.

For Li-ion cordless tool batteries or notebook batteries, normally speaking, the higher capacity (mAh), the larger in size, and heavier in weight. Of course, more capacity means longer run time. A 1500mAh 18 V battery will run longer than the 3000mAh 18 V battery, but may not the running time.

Share Button

How to Calculate the Number of Cells in a Li-Ion Laptop Battery

You may find that most of laptop manufacturers will state how many cells in their Li-ion laptop battery, such as Dell, Sony, ACER and so on. Further more, many laptop battery reseller also say the number of cells of their Lithium-ion Laptop battery.

But, do you know to calculator the number of cells?

First of all, let’s know the inside of a Li-ion Laptop battery, it is made with outside plastic case or aluminum case, circuit boards, 18650 battery Cells. These are the main three parts of a Li-ion notebook battery.

So, what are 18650 battery cells?

It is called by its size, the diameter of it is 18.6 mm and the length is 65.2 mm, so the name is combined with the first two numbers of the diameter and length. This cell type is used in many laptop batteries, the Tesla Roadster, Tesla Model S, and LED flashlights.

Because most of the Li-ion notebook batteries are made with 18650 battery cells, and the capacity of it is 1800 mAh to 3400 mAh, this depends one what cells the battery use.

The voltage is 3.7 V, but, some battery cell manufacturer may say 3.6 V, in fact, 3.7 V and 3.6 V rechargeable is the same thing. Those are the mean/average voltages under load and it has to do with fully-charged-open-circuit-voltage. 10 years ago Li-ions were only charged up to 4.1 V and the mean/average voltage under load was 3.6 V. A few years later the manufacturers changed this to 4.2 V to increase the capacity of the batteries. Obviously this else made the mean voltage under load increase.

Even today, though it still makes sense to only charge your batteries (18650 for example) only up to 4.1 V as this drastically increases the life expectancy (number of cycles) of the batteries while only reducing the capacity by ~10%. Many hobby chargers allow doing this.

Now, we know what a Li-ion laptop battery is made of, and let’s calculate the number of cells.

As we know, series in physics makes current the same, but voltage will plug one by one, parallel makes the voltage the same, but Current will plug one by one.

For example, a 10.8 V 4400 mAh Lithium-ion laptop battery, in order to have the 10.8 V, it must take 3 battery cells, and in order to have 4400 mAh, it must have 2 cells. So, this needs 6 cells, and this is the number of the Li-Ion Laptop battery.

Share Button

5 different shapes of Bosch cordless power tools Battery

When using a Bosch cordless power tools, you need a battery. If you have many cordless drills, hammer, planer, circular saw, impact wrench and so on, the rage of the voltage is from 3.6V to 36V, so you have a large selection on Bosch tools. But, do you know how many battery shape of all Bosch cordless tools battery? Let me show you.

There are 5 shape of battery on batteries for Bosch cordless tools.

First, Bosch straight-shape battery packs.

In this range, you can find it in 3.6V, 10.8V tools.

For example,

3.6V straight-shape battery: Bosch 2 607 336 242 Battery
Bosch 2 607 336 242 Battery
10.8V straight-shape battery, Bosch 2 607 336 014 Battery

Second, Bosch Flat-shape battery packs

Here are the examples:

7.2V flat-shape battery: Bosch 2 607 335 033 battery
Bosch 2 607 335 033 battery
9.6V flat-shape battery: Bosch 2 607 335 037 battery

12V flat-shape battery: Bosch 2 607 335 055 battery

14V flat-shape battery: Bosch 2 607 335 210 battery
Bosch 2 607 335 210 battery
Third, Bosch bulb-shape battery pack, it just looks like a bulb.

7.2V bulb -shape battery: Bosch 2 607 300 001 battery
Bosch 2 607 300 001 battery
9.6V bulb -shape battery: Bosch 2 607 300 002 battery
Bosch 2 607 300 002 battery
12V bulb -shape battery: Bosch 2 607 335 021 battery
Bosch 2 607 335 021 battery
Fourthly, Bosch pod style battery pack

9.6V pod style battery: Bosch 2 607 335 540 battery
12V pod style battery: Bosch 2 607 335 262 battery
Bosch 2 607 335 262 battery
14.4V pod style battery: Bosch 2 607 335 694 battery
Bosch 2 607 335 694 battery
18V pod style battery: Bosch 2 607 335 266 battery
Bosch 2 607 335 266 battery
24V pod style battery: Bosch 2 607 335 510 battery
Bosch 2 607 335 510 battery
The last one is the Bosch slide-in battery packs, this type of battery is always Li-ion batteries.

14.4V slide-in battery: Bosch 2 607 336 224 battery
Bosch 2 607 336 224 battery
18V slide-in battery: Bosch 2 607 336 236 battery
Bosch 2 607 336 236 battery
24V slide-in battery: Bosch 2 607 335 216 battery
2 607 335 216 battery
36V slide-in battery: Bosch 2 607 336 002 battery
Bosch 2 607 336 002 battery

Now, you know the shape of the Bosch power tools battery, the next time when buying the battery, I suggest you to check the shape of your old battery, otherwise, you may buy the wrong one.

Share Button

10 tips on making the Ni-CD and Ni-MH rechargeable Cordless power tools run longer

If you want your cordless power tools to be durable use, you must know how to maintenance it. But, for tools used with Ni-CD or Ni-MH batteries, the main point is how to protect the battery and charger. in order to better protect the battery and charger, here are some particular attentions:
1. When in summer, the temperatures are high, long working hours make the battery to high temperatures, and even produce burst phenomenon, so, attention should be adapted to control the battery temperature.
2. After a battery is fully charged, the charger will be hot, so it is better to charger another battery after 10-15 minutes.
3. Because the Ni-CD and Ni-MH battery has the “Memory effect”, long-term improper charging and discharging will made the battery life shortened.
4. Batteries are chemical substances is prohibited hit the water, otherwise there is risk of a problem but will not be able to repair, to replace the battery, the old battery can only be scrapped。
5. Unplug the power of charger when there is no battery.
6. Charging the best in the room, the temperature is below 38 degrees is best.
7. Thunderstorms often occur in summer, when lightning and voltage instability, please do not charge the battery, because this will may the charger easy to burn.
8. Pay attention to the working environment, to avoid metal is sucked inside the motor magnetic motor, this will cause the motor stuck phenomenon.
9. Recharged the battery for every two months if not used, otherwise it may appear the phenomenon of cell necrosis.
10. Old batteries should appoint good collection and treatment, so as not to pollute the environment.

Share Button

DeWalt DCD710S2 12V 1.5AH Li-ion battery reviews

We provide the best Dewalt Battery which fits DCD710S2 cordless drill. When you buy Dewalt DCB120 Battery or Dewalt DCB121 Battery from us, you can be rest assured that you are receiving the best value and service for your money. This replacement Cordless Drill Battery is guaranteed to be brand new and fresh from our factory.

Product ID: TFDW090

Battery Type: Li-ion

Battery Voltage: 12V

Battery Capacity: 1500mAh

Battery Size: 90.75 x 64.45 x 45.30 mm

Fit Modes: DCD710S2, DCF610S2, DCF813S2, DCF815S2, DCK211S2, DCS310S1, DCT410S1

Compatible P/N: DCB120, DCB121

Battery Condition: Replacement Battery (Brand New)

Guaranteed: 30 Days Money Back, 1 year warranty!

Final Price Including VAT- UK and Irealnd Only!

Sale Price:
See details at

Here are some reviews about this replacement battery :

Received the battery in good packaging, grate value and quick delivery. After using it, I’m more satisfied with this purchase as the 1.5Ah DeWalt DCD710S2 Battery has a very good performance in my DeWalt DCD710S2 drill. I use this drill quite offen as it is Lightweight designed and I can hook the belt around my shoulder and carry it to my workplace with ease, and the battery is light and powerful.

I bought this battery because my original battery was running out of juice in the middle of a project, it is light and powerful, and easy to charge. I use this DeWalt drill a lot, as it gest into tight places that other drills can’t, so a good quality battery is very important. Great buy for the money!

I was worried about power and longevity when I bought this replacement battery, but not after using it. I love the light weight, compact size, and most importantly, it offers amazing power and excellent battery life. If someone is going to own just one spare battery, I would recommend this as the one to own.

I’m glad I bought it, powerful li-ion battery, works great. Now my drill can get in those tight spots easily again with it. long battery life.

Share Button