I chose this on the many positive notes I've read. And I am not disappointed! He turned a non-stop week to put right my old battery Ni-mh and balance sheet, I have three AA batteries that were diagnosed as having a capacity of 1000 mah (theoretical vs 2300) that are uploaded after 1800 mah regeneration! Two AAA which are increased from 400 to 700 and a final AA is totally HS. This is also the only one that has overheated. All the others were well treated by the loader and remained cold during charging. It's really a good buy for anyone who has rechargeable batteries and wants to keep them in shape over the load!