A rechargeable battery, such as a 12 Volt battery that is recharged by a solar panel, is placed into a container system that includes an enclosure, having a top portion that is open and a bottom portion that is open, that is substantially buried underground. A sleeve, having a bottom portion that is open and a top portion that is closed, is lowered into the enclosure such that air is trapped inside the top portion of the sleeve when water collects against the enclosure. The trapped air prevents flood water from rising high enough to contact terminals of the battery. When flood conditions subside, the water drains out the bottom portion of the container system into the ground. Additionally, a ridge around the bottom of the sleeve makes it easier to insert the sleeve into the enclosure because the ridge slides over the dirt and debris, but the ridge scrapes and removes unwanted dirt and debris from the enclosure whenever the sleeve is removed to access the battery. A battery platform may be used to raise a battery higher into the sleeve. The entire container system can be completely buried underground, but access to a battery in the container only requires that the dirt covering the top most part of container be removed, and then the sleeve is simply lifted out of the enclosure without having to dig around the enclosure.