If you are a battery, the best accolade you could wish for would be a 5 star rating from NLee the engineer. This battery doesn't disappoint. It is slighly larger in diameter than standard AAs, so it may not work in all applications. My son has an Xbox one with four controllers, and this works well. I store the batteries charged, so when one controller runs out of power it's easy to swap in a new set and charge the old ones. No complaints and the price is great.