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Samsung cell INR21700-30T 3,7V 3000 mAh Spot welded
Index:
EAN:
Available
High-quality cells from the best suppliers
Compatible with a wide range of tools
High performance in all conditions
12-month warranty
Samsung INR21700-30T Cells
Original lithium-ion cells manufactured by Samsung with the designation INR21700-30T. These cells have a capacity of 3000 mAh and a current rating of 35A, ensuring reliable battery performance even under very high loads.
Ready-Made Cell Connectors
You can also order these cells with pre-attached leads, which allow for quick connection of electronics to the cell pack, BMS, or external contacts. Additionally, Kapton tape protects the pack against overheating and short circuits.
Spot Welds
Cells with visible spot welding marks on the terminals. The presence of welding marks does not affect their operation or safety. Welding marks are a natural result of the manufacturing or preparation process for integration and do not constitute a defect.
Suitable for:
- • Electric bikes and scooters
- • Power tool batteries
- • Energy storage systems
- • DIY battery building (with BMS)
- • Robotics and industrial applications
Not suitable for:
- • Vaping devices / e-cigarettes
- • Consumer electronics without protective circuits
- • Using batteries without proper casing or BMS
- • Children's toys
- • Non-professional DIY projects
General lithium-ion battery handling instructions
- ⚠️ Important safety note
- This cell is not protected and is not recommended for use in e-cigarettes, vaping devices, or similar consumer applications. Intended for professionals with appropriate BMS systems.
- Before installation
- Check all cells for damage, swelling, leakage, or corrosion.
- Ensure polarity is correct and contacts are clean.
- 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 designed specifically for the cell type.
- Li-Ion: Always use a BMS system. Charge in a fireproof location.
- 📦 Storage
- Store in a cool (15–25°C), dry place away from 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 leakage occurs – stop use immediately.
- Do not puncture or open sealed cells.
- ♻️ Disposal
- All batteries must be taken to recycling points.
- Never dispose of in regular trash.
Data sheet
- Battery capacity
- 3000mAh
- Cell type
- Litowo-jonowe
- Cell brand
- Samsung
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.
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High-quality cells from the best suppliers
Compatible with a wide range of tools
High performance in all conditions
12-month warranty