C.Crane 11-in-1 Solar Battery Charger

The Solar 11-in-1 Battery Charger is a handy device for those looking to recharge their batteries using solar power. However, it does have some limitations. One of the main drawbacks of this charger is that it takes a long time to fully charge the batteries. According to one user, it can take several days to get a battery fully charged. This could be problematic if you're in an emergency situation or need a quick recharge. Another limitation is that the charger does not have overcharge protection or an intelligent shut-off feature. This means that it is up to the user to monitor the charging process and prevent overcharging. While there is a diode that prevents reverse current flow, it is not foolproof and users need to be careful to avoid damaging their batteries. On the upside, the charger is compatible with various battery sizes, including AA, AAA, C, D, and 9-volt. It can charge up to two batteries at once, making it convenient for those who have multiple devices that require different battery sizes. In terms of usability, the charger works best on sunny days and performs better when the solar panel cover is propped up at a 45-degree angle to the sun. It also has a built-in meter that gives an estimation of how long it will take to charge the batteries based on the amount of sunlight it is receiving. Overall, the Solar 11-in-1 Battery Charger is a decent option for those who want to harness solar power to recharge their batteries. However, it is important to note its limitations in terms of charging speed and lack of intelligent shut-off.