Lishen LR2170LA 21700 4000mAh Battery – Unprotected is a rechargeable 3.6V lithium-ion flat-top cell, sold individually. It has no built-in protection circuit and requires appropriate protection in the battery pack or equipment.
Battery specifications
| Manufacturer | Lishen |
|---|---|
| Model | LR2170LA |
| Cell size | 21700 |
| Nominal capacity | 4000mAh |
| Nominal voltage | 3.6V |
| Maximum charge voltage | 4.2V |
| Discharge cutoff | 2.5V |
| Discharge current | Supplier lists 35A maximum continuous for cycle life; 45A requires an 80°C temperature cutoff. Do not treat 45A as an unrestricted rating. |
| Approximate dimensions | 21.1mm diameter × 70.5mm length |
| Approximate cell weight | 65g |
| Terminal | Flat top |
| Protection | Unprotected; use only in a properly designed protected battery pack with BMS or PCB |
| Package quantity | One cell |
Charging, protection and fit
Use a charging system specified for this cell’s lithium-ion chemistry and 4.2V maximum charge voltage. Follow the cell documentation for current, temperature and discharge limits. Battery size alone does not establish compatibility: check the complete cell dimensions, flat-top contact and protection requirements.
Keep individual cells in an insulating battery case. Do not use a cell with a damaged wrapper or insulator, or carry loose cells with metal objects.
This cell is supplied for integration into protected battery packs with a BMS or PCB. It is not intended for standalone use or use in e-cigarettes or vaporizers.
Related cells and charging equipment
Browse 21700 cells or compare battery chargers. Confirm the charger’s chemistry, voltage, current and physical fit in its manual before purchase.
For fit questions or volume pricing, email Sales@RocketDistributing.com with product reference LISHEN-21700-40, quantity and equipment requirements.