# Set of 2 Li-Ion batteries, 25R, 18650, 3.7V, 2500mAh, 8C

- Page: https://sigmanortec.ro/en/set-of-2-li-ion-batteries-25r-18650-37v-2500mah-8c
- Price: 68.10 RON
- Availability: Out of stock
- Reference: 44002 · EAN: 5946151918083
- Category: Electronic components > Battery
- Specifications: Technology: Lithium Ion; Output Voltage: 3.7 V
- Package (shipping data): 0.099 kg
- Updated: 2026-04-07
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 02:22 (Europe/Bucharest)

## Description

Set of 2 Li-Ion 18650 25R batteries, 3.7V and 2500mAh each, optimized for high-power applications, offers 8C discharge up to 20A and low internal resistance for stable performance. Flat head for spot welding packages, delivered with plastic box for safe storage and transport.
Set containing two 18650 type Li-Ion batteries, each with a nominal voltage of 3.7V and an individual capacity of 2500mAh. With a discharge rating of 8C, these batteries are suitable for equipment that requires a high discharge current of up to 20A.
The discharge rate in "C" is a standardized way of indicating the speed at which a battery can be safely discharged without affecting its performance or lifespan. The "C" value is related to the nominal capacity of the battery. The discharge rate is 8C (8 x 2500mAh capacity = 20A maximum discharge current). The indicated charge rate, also expressed in "C", is 0.5C (0.5 x 2500mAh = 1.25A).
The maximum recommended discharge current for the longest possible battery life is 6C, i.e. 15A per cell.
The battery has a flat head, suitable for making battery packs by spot welding and weighs 46.25 grams.
The set is delivered with a plastic storage box, designed to protect the batteries against mechanical shock and short circuits during transport or storage.
Specifications:
Battery type: Lithium Ion
Format: 18650
Model: 25R
Nominal voltage: 3.7V
Charging voltage: 4.2VDC
Discharge voltage: 3.0VDC
Internal resistance: 13mΩ
Capacity: 2500mAh
Discharge rate: 8C (max. 20A)
Recommended maximum discharge rate: 6C (15A)
Charging current: 0.5C (max. 1.5A)
Protection: Without integrated protection circuit (use with devices that have protection is recommended)
Weight: 43.17g (per battery), 98.95g total 2 batteries and case
Dimensions mm: 65 x 18mm
Use:
Use a compatible charger for Li-Ion 18650. Do not overcharge or leave unattended while charging.
Store batteries in the included protective case in a cool, dry place. Avoid extreme temperatures.
Check compatibility with your device before use. Do not mix new and old batteries or batteries of different capacities.
Do not puncture, short-circuit or dispose of in fire. Replace batteries if you notice any deformation or leakage.