Folding Solar Panel Charger 26W ELEGEEK Foldable Solar Charger with SUNPOWER High Efficiency Solar Panel and USB + DC Output for Universal Cellphone iPad Battery Charger Car Charger Emergency

The panel is sturdy and well made, and makes a good impression.The panel is not quite optimal for direct charging 12V lead-acid or LiFePO4 batteries. Its maximum power point is somewhat below the typical charging voltage of 12V lead acid batteries, and is especially well below that of LiFePO4 batteries. It will provide some current, because its Voc is 14-15V (depending on temperature), but especially in warm summer weather the power yield will be low.Where it shines, is for powering portable electronics designed for 12V car batteries and tolerating 10-15V input: portable AA/AAA battery chargers, portable radio receivers and transceivers etc. One minus for the radio applications is that the built-in USB regulator generates some radiated VHF noise, and lots of conducted HF and VHF noise. The conducted noise is very nasty, and is impossible to get rid of, as the regulator cannot be (easily) disconnected.Speaking of the USB regulator, it has an undervoltage cut-off, and will restart charging interrupted by shading, which is very convenient when charging e.g. the iPhone. The regulator was seemingly attached to the panel as an afterthought in the design process, as it considerably increases the panel's bulk in the folded state.Here are my DC yields from a warmed up panel in warm windless weather, clear sky, and at an optimal angle to the sun:1.7A × 10.6V = 18.02W1.6A × 11.1V = 17.76W1.5A × 11.5V = 17.25W1.4A × 12.1V = 16.94W1.0A × 12.7V = 12.70W0.9A × 12.9V = 11.61W0.5A × 13.4V = 6.70WIn a cold windy weather the yield may be higher by about 1V.I ended up opening up the solar panel and soldering down a bypass around the regulator. This totally solves the RF noise problem, and boosts the voltage by 0.3V, which are otherwise lost at the blocking diode, and the current by 20 mA, consumed by the idling USB regulator.There are, unfortunately, no built-in folding legs to angle the panel.It would also be nice, in my opinion, if the manufacturer had on offer a similar 6-section panel, with 2 DC outputs — 12V and 18V, and no or switch-able USB regulator. They do have on offer a 40W 18V panel, but it no longer fits in a small backpack, and a separate regulator is needed for 12V devices. This is, of course, not a drawback of this panel, just a wish.

Compact easy to backpack. Used with TalentCell Rechargeable 12V DC Output Lithium battery.

After 1 year of use I can say that it is very durable and fast for charging.Maybe I'll buy another one ;-)

Great product. I was able to charge my Android cell phone and my iCom 51 ham radio at the same time. Also, I used it to recharge 20000mAh battery pack from Jackerry. Having 12V (Over 15V in full sun with no load. 13.7V with the mentioned load) and 5V at the same time is priceless and gives you tons of options. Most likely you will need to make or purchase some extra cables to take full advantage of the 12V output. The provided cable did not work for me as I needed to use car cigarette lighter plugs.

Me encanto el producto, es muy practico para cualquier tipo de actividades al aire libre y es compatible con todos los dispositivos que requiero al hacer trekking a diferencia de otros que no son compatibles con IOS por ejemplo.