... 2013 HongKong Lighting Fair,6-9th,April,2013.Welcome to our booth.Booth No:3C-E05Specifation:1) 40 ... sealed lead-acid battery8) Recharging time : 20~25 hours 9) Charging circuit is a transformer, Over charge protection 10) ... 2.In the charging state,whether push the switch up or down,all the led lamps off ... 2-3months when it is not to use for a long time 5.In order to preserve battery power.donot charge ...