If you are short on power, then Maplin have the answer with our Maplin 80x AAA LR03 Alkaline Batteries 7 Year Shelf Life High Performance with Free Battery Tester. Great for a multitude of uses from TV remote controls to remote controlled toys and also for cameras, MP3 players, torches, pocket TVs and games machines. In fact, they're ideal for pretty much any small, portable electronic and electrical device. Maplin Universal Analogue Battery Tester for AA, AAA, C, D, 9V PP3 & Coin Button Cells Handy, compact battery tester with an easy-to-read analogue display. Suitable for testing most household batteries and button cells. Measures the batteries under load to accurately indicate charge status Suitable for testing AA, AAA, C, D and 9V PP3 batteries and button cells Easy to read analog display needle indicates "good" (green) , "low" (yellow) , and "replace/recharge" (red)