This is the standard Slow Wall Charger that comes with the Icom IC-R5 and IC-R20 as standard, but if you have lost yours then this is the replacement you need. With auto-peak cut off the charger will charge the batterries at 1/10th of the mAh of the batteries installed. What this means is that if your rechargeable batteries are say 700mAh, then the slow charger will charger at 70mAh an hour taking 10 hours to charge. If you want to fast charge the batteries you will need the MW-1298 Fast charger which will charge your batteries at 700mAh taking 1 hour to re-charge them.