excellent piece of kit. it will charge most li-ion batteries and my 18650 charged up in about 4 hours i believe, it wasnt long before i could use my torch. well worth investing in, even if it only replaces your 3x AAA batteries. Do it you wont regret it. Oh 1 thing to mention, for ALL non US residents, make sure you have a spare 2pin (figure 8) mains cable. it comes supplied with a US plug, not much use in the UK.