Review on Maximize Battery Life: Battery Saver 2365-24 24V 50W Quick Charger with Auto Pulse Maintainer by David Monaco

.but it cannot save everyone. I have a couple of OLD 24v battery packs that have worn out terribly over their lifetime and have been idle for a couple of years. I started with the battery with the highest voltage listed (18V) and the Save-A-Battery feature actually restored both batteries to 85-90% state of charge. The rest was too far away. A NOTICE. The device will display battery error multiple times until the battery reaches a certain voltage level, after which the device will keep the battery healthy. Although I haven't measured it, it also seems to hold a higher charge than the OEM charger for a 'new' battery. Time will tell if it's worth the higher price.