18650 li-ion battery, high quality, long service life and eco-friendly. high capacity battery, rechargeable design for long term use. low discharge rate, no memory effect. built-in short-circuit and overcurrent protection. suitable for most electronic products, such as torch, flashlight, power bank, toys, etc. specifications: model: 18650 battery standard capacity: 3800mah rated voltage: 3.7v charging voltage: 4.2v ±0.05v charging current: 1a discharge current: 5200ma discharge voltage: 2.75v charging time: 5-8 hours working temperature: 0°c~50°c (charging) / -20°c~+62°c (discharge) dimension: approx. 68 x 18mm / 2.68" x 0.71" package includes: 2 x 18650 li-ion battery