I would like to say this product works just fine, but I'm not 100% sure. Purchased this to replace the 1st Gen Nook charger for an equally old (surprise) 1st Gen Nook. The Nook itself required a battery replacement as the original had somehow become swollen and useless. So I swapped out the battery and used this to charge the Nook, which seemed to work as the screen went blank after being stuck on the "low charge" display. Unfortunately, the Nook didn't seem to hold a charge anymore. Or something else went wrong.