... ring, convenient to wear. 4, Maintenance-free KS2.5LM (A) miner lamp requires a special charger to recharge. The voltage of general ... there is about 50 % capacity. 2, During transport ,keep the miner lamp from intense mechanical shock ,shine,rain, and prevent from throwing ... heat source. 4, If the lamp is stored more than 6 months,it must charge before using.. KS2.5LM lead-acid miner lamp