Smart battery generators were a recurring theme this CES. These are devices with large batteries—usually lithium ion—connected to an integrated sine-wave AC inverter, and other goodies such as direct low-voltage DC charging points for all your devices. These come in pretty handy as a replacement for small gas-powered gensets you take along for camping, as the battery drains much slower than the genset burns fuel at its lowest-load state; and many of these batteries include a means to recharge with solar power, using portable, foldable PV panels.AllPowers showed off a wealth of battery generators, ranging from smaller brick-sized ones with around 3000 Whr batteries; to very large ones with 405 Ah internal batteries that can put out 2.4 kVA AC output. Its largest one sits on wheels and puts out 4 kVA using a 690 Ah internal battery. Commong to these generators are AC power inputs with power draw ranging between 1000 W to 1700 W, and 2-pin DC for PV solar panels; and outputs with one or more 3-pin AC outputs, and power-delivery USB ports in both type-A and type-C sizes. Displays put out real-time status, including battery and time-to-drain/recharge. AllPowers also unveiled fold-out PV units that can generate anywhere between 100-400 W of power, which the generator can immediately convert to AC, or recharge itself.Jackery presented similar kinds of battery-generators as AllPowers, their generators are available in the same range of power output. Some of these are shaped like travel bags that you can lug around (just don't take them to an airport!). Jackery also showed us a 15-inch pizza box-sized fold out PV panel. Ecoflow, besides showing off a range of battery-generators, also unveiled a battery-powered refrigerator and ice-maker that can come super-handy for camping trips where you want something to sip and need fresh ice made from spring water.Update Jan 9th: We also came across Bluetti, which is specializing in stackable mobile battery generators that can power entire mobile homes or on-site science labs. The company also showed off home power solutions using 9 kVA lithium-ion battery packs that can be connected to home solar roofs and work to either let you live off-grid, or vastly cut down your utility bills.