I always have 2 settings on my chargers for small reciever packs like 1500-1700. Setting #1 is 1.5amps then when the packs cool I hit them again at setting #2 0.5amps. Memory slot #1 is not the best way to make your packs last the longest as far as life cycles go but #2 takes too long but is much more friendly to your pack. Pick your poison & Dreaux AA size batts are more tollerant of over 1C charging but never go over 1C with "2/3 A" size reciever packs they get very hot very fast & will cut your potential life span in 1/2. 1/2C or less is what is recomended with 2/3 A cells.