Reply to the post of 573647659, dear, this question will be considered before you decide not to stay in the hotel. Generally, it is enough to prepare a 5w- 10w solar panel, mainly to charge the mobile phone. Flashlights, cameras and GPS can all choose products that use AA batteries, such as JETBEAM's economic series BA 10 and Nikon's L-26. As for GPS, basically all outdoor handheld devices use AA batteries. It is suggested to buy six sanyo eneloopAA and four AAA4. You can choose the same brand AA-AAA dual-purpose charger. It is impeccable to buy an aluminum case mobile power supply for Shuyang Electronics (with two pieces of Panasonic's best green leather 18650, integrated with Miller charging and discharging). I wonder if the above answer is enough for you? View original post >>