It’s tough to find a portable battery that’s got some speed in terms of wattage, but that isn’t too big. We found one at Amazon that matches this criteria, and thankfully, it doesn’t cost all that much. Zendure’s 10,000 mAh SuperMini X3 portable battery can keep your handheld topped off, be it a Steam Deck, Nintendo Switch, or an iPad, without being anywhere near as bulky as any of those items. This battery is normally $49.99, but Amazon Prime members can currently pick one up in silver for just $34.99.