MACKWELL B616/B812 Replacement Battery — 4.8V 4000mAh (19.20Wh)

Wide compatibility: fits MACKWELL B616,B812 models. Specifications: Parameter:4.8V/4000mAh/19.20Wh. Notes: Faston 2.8mm. Safety & quality: No memory effect. Every battery is CE certified, tested by manufacturer to match OEM standard, and built with multiple circuit protection to ensure dependable, safe performance.