Original lithium-ion cells manufactured by Samsung with the designation INR21700-50S. These cells offer a capacity of 5000 mAh and a current output of 25 A, ensuring reliable battery performance even under very high loads.
Pre-welded Nickel Output Tabs
Ready-made output tabs welded to the cell pack enable quick and reliable connection of electronics, BMS, or external terminals. Clean welds with low resistance ensure durability and performance. Additionally, Kapton tape protects the pack from overheating and short circuits.
Suitable for:
• Electric bikes and scooters
• Power tool batteries
• Energy storage systems
• DIY battery packs (with BMS)
• Robotics and industrial applications
Not suitable for:
• Vaping devices / e-cigarettes
• Consumer electronics without protection circuits
• Using batteries without proper casing or BMS
• Toys or non-professional DIY projects
General Lithium-Ion Battery Handling Instructions
⚠️ Important Safety Notice
This cell is not protected and is not recommended for use in e-cigarettes, vaping devices, or similar consumer applications. Intended for professionals with an appropriate BMS system.
Before installation
Check all cells for damage, swelling, leaks, or corrosion.
Ensure correct polarity and clean terminals.
Do not mix different types or new with used cells.
⚙️ Cell Characteristics
Li-Ion: Nominal voltage ~3.7 V per cell (max. 4.2 V / min. 3.0 V).
? Charging
Use chargers specifically designed for the given cell type.
Li-Ion: Always use a BMS system. Charge in a fireproof area.
? Storage
Store in a cool (15–25°C), dry place away from direct sunlight.
Li-Ion: Store at ~3.7 V (40–60% capacity).
⚠️ Safety Tips
Do not short-circuit terminals or expose cells to fire, heat, or water.
If overheating, swelling, or leaking occurs – stop using immediately.
Do not puncture or open sealed cells.
♻️ Disposal
All batteries must be taken to recycling centers.
Never dispose of in regular trash.
Battery capacity
5000mAh
Cell type
Litowo-jonowe
Cell brand
Samsung
Condition
New
1) The accurate working temperature Batteries suffer very badly at extreme temperatures. If you want to extend the life of your battery, you should avoid overloading it too much. If your battery works for a very long time, that's why it is probably very hot. It is wise to pull it out of the device and wait 10-15 minutes until it cools down.
2) Battery overcharge If you want your batteries to have a very long life, you should also avoid their deep discharge. If during daily work on the battery you see a fairly large decrease in the efficiency of the device powered by the battery, you should stop its work as soon as possible and connect the battery to the charger.
3) Battery rest You must also remember that the discharged battery for proper operation needs about 5 minutes of "free charging" before connecting to ”normal” charging. During "free charging" our battery temperature will drop significantly which will obviously have a very beneficial effect during subsequent charging.
4) Appropriate storage of the battery The life of batteries is also greatly influenced by their proper storage. If you are not going to use the battery in the near future, it is worth charging it for the level 60-70%. Charged battery should be put in a safe place with temperature above zero.
5) Battery formatting If you have batteries based on popular NiCd cells, you should also remember that it is possible that the so-called "memory effect" may occur. Batteries with NiCd cells should be discharged at least once every three cycles, and then charged to 100% level. Through these actions you will keep the maximum capacity of the battery.
Frequently asked questions... and answers :-)
If my previous battery was NiCd and now I have NiMh, will my old charger work properly? Batteries that have been built on both NiCD and NiMh cells can work in the same voltage ranges. They also have the same charging current. Thus practically every NiCd charger can also operate a NiMh battery. In case of any questions or doubts about the charger or batteries, please contact our customer service department.
Is it necessary to remove the battery from the device each time after work is completed? Warto pamiętać, iż jeżeli nasz akumulator nie jest aktualnie używany, może pozostać w urządzeniu. Należy przy tym mieć świadomość, iż pozostawiając go tam na dłużej, może się rozładować. Dlatego istotne jest, aby naładować go do minimum 60%, jeżeli nie chcemy aby uległ rozładowaniu.
Guaranteed battery life The guaranteed operating time on a given battery depends on the battery load at a given time. For example, if you use a battery for screwdriving, you will need less energy for this than, when working with a chain saw, and therefore, the operating time may be longer. Unfortunately, power tool such as chainsaws have a current flow of more than 25A, so the working time is shorter.
What is the difference between NiCd and NiMh batteries? Newer models are NiMh cells. Their main advantage is the fact that they have a higher energy density as well as the lack of memory effect. Thus, in contrast to NiCd batteries, a newer model can be recharged at any time, without losing capacity.
If the purchase battery does not match my power tool, can I return it? We have been selling on the Internet for many years, for this reason situations like this are not new to us. Thus, in order to meet the expectations of our customers and not to cause them any problems, anyone who has bought a product from us can return it within 14 days from the date of purchase.
High-quality cells from the best suppliers
Compatible with a wide range of tools
High performance in all conditions
12-month warranty
Tap to zoom
This site uses cookies to deliver services in accordance with the Privacy Policy . You can specify the conditions for storage or access of cookies in your browser.
