Prodcuts > Protected Battery > Protected 18650 Series
KeepPower 3500mAh 18650 protected li-ion rechargeable battery 3.7V P1835J
* Quality Protected Li-ion Rechargeable Battery
* Brand: KeepPower
* Size: 18650
* Part No.: P1835J
* Maximum Size:(D)18.6*(L)69.1mm(±0.2mm)
* Nominal Voltage: 3.7V
* Nominal Capacity: 3500mAh
1.   Protected 18650 Li-ion Rechargeable Battery P1835J
2.   Minimum Capacity: 3350mAh
3.   Typical Capacity: 3500mAh
4.   Normal Voltage: 3.7V
5.   Quality Li-ion rechargeable cell made in Japan
6.   In Built Safety Circuitry
7.   Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)
8.   4.2 volts max voltage and 2.5 volts cut-off voltage
9.   Over 500 charge-discharge cycles

Application:

1.  Lighting Devices
High-power flashlights & tactical flashlights: Delivers long-lasting high lumen output for outdoor, duty, and rescue operations.
Headlamps, camping & work lights: Stable voltage ensures consistent illumination for night work or outdoor activities.
2.  Drones (Small / Toy Grade)
Provides lightweight, high-energy-density power for small drones or toy-grade aircraft, extending flight time.
3.  Portable Fans
Compatible with handheld, neckband, and desktop portable fans – 3500mAh supports extended cooling time.
4.  Night Vision Backup Battery
Serves as backup power for night vision goggles or infrared observation devices, ensuring continuous operation during night missions or field surveillance.
5.  Thermal Devices
Provides stable, low-internal-resistance power for handheld thermal cameras and industrial thermometers, ensuring image quality.
6.  Smart Locks
High-capacity with built-in protection circuit prevents overcharge/over-discharge, ideal for smart lock systems requiring long-term reliable power.
7.  Medical Devices
Suitable for portable medical instruments such as glucometers, blood pressure monitors, therapy devices, and medical lighting – fully certified for safety.