
Keeps the battery maintained/charged in my 20 year old suburban at about 13.1V, which is good for long life of a 12V lead acid battery. I leave the charger outside in the open, rain, with no issues for months now. The included connector for the battery works great for quick connect, disconnect when I use the vehicle. If I forget to unplug it, it unplugs itself just fine when I back out. It's not very good as a battery charger with very low, slow current.
![megawise car battery jump starter - 1500a peak 16800mah portable power pack for up to 7l gas or 5l diesel engines, dual usb outputs, auto battery booster [2021 upgraded model] logo](https://images.revain.org/blob/wysd4jyw_1f428fea72@128x128.jpg)
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