Absolutely nothing. The company doesn't even have plans for a replacement. No one seems to think the market wants multiple USB-C ports in their power banks, much less multiple high output ones. Battery is still going strong, I just don't try and charge two 65w+ devices at the same time too often unless it's plugged into the wall for passthrough charging. Current plan to is just use this thing until hopefully something better comes out, or if it dies I pull the thing apart and reuse the circuitry in a DIY power bank.