I originally bought this charger for&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Apple-iPod-touch-32-GB-3rd-Generation-OLD-MODEL/dp/B002M3SOC4/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Apple iPod touch 32 GB (3rd Generation) OLD MODEL</a>&nbsp;and it worked perfectly.  It could recharge my iPod at least 3 times (from 0% to 99%) before I needed to recharge the Trent External battery (maybe more).  Then, I got a&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Apple-iPod-touch-32GB-4th-Generation-Black-Current-Version/dp/B001FA1O18/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Apple iPod touch 32GB (4th Generation) - Black - Current Version</a>&nbsp;and the Trent external battery charged that one just as well as my last iPod.