Description of RockWedge LED White: best battery on the market. The biggest complaint about some of the other battery powered par lights on the market is that the battery does not last long enough and that the batteries die every few months. Our rockwedge LED uses the best battery on the market. It will last twice as long as the other battery powered par lights on the market. These batteries can cycle hundreds of times without you ever needing to replace them. Our Built-In battery is 7, 500 mAh. The famous brands on the market have batteries that are around half of this one and they still charge almost twice the price. Our Light can run 36 hours on a single charge with single color mode. The rockwedge LED has a battery indicator on the LCD display so you know how much longer your battery will last. Our model also has field replaceable batteries in case the battery does ever go bad.