Paul writes -
I got one of those battery extenders the other week and have been working through several years worth of “dead” batteries. At $40 for the device, if these all get used just once more, it paid for itself. And I assume I can get more than one re-use out of each one. Admittedly, each additional use cycle will be shorter, but if offered a 90Â¢ return on each dollar, then 75Â¢, then 60Â¢, then 50Â¢ etc. who wouldn’t take it?
Battery charger – it paid for itself – Link.