Need 4800mAh Kaicom K7-40 Battery? This K7-40 battery 100% compatible with Kaicom K7-40. The battery is up to standard and fully compatible with original specifications. We offer 12 months warranty on our all batteries! During this period, if your battery fails, we will replace your K7-40 battery with a new one. All our batteries are certified by CE, UL, ROHS, ISO9001/9002 as safe products.