As I understand that risk is minimized with a modern battery tender.

Is it safe to use a battery tender in a closed garage. Ive made a battery charger that can charge ten batteries. All Battery Tender battery chargers are designed to fully charge and maintain a wide range of styles of lead acid batteries in ways that avoid the potential damaging effects that can be caused by most trickle chargers. Why its Perfectly Fine to Leave Your Battery.

Maintainers will only emit a charge when the batterys voltage drops below 100 state of charge. Charging batteries produce hydrogen gas. The battery is in use even when the ignition is off so it can quickly drain simply sitting in your car garage or self-storage unit.

A flashing green light indicates that the battery is over 80 charged while a steady green light will let you know that your battery is completely charged. Charging it in your closed trunk is a little riskier but i still do it. January 11 2017.

The result is that a battery maintainer wont overcharge the battery like a charger might which can help extend the life of the battery overall. The charger and maintainers do not trickle charge. Clearly the main advantage of battery maintainers is that they wont overcharge the vehicles battery.

Battery Tender chargers are designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers. Granted we are talking a much larger scale but the batteries used are batteries you will find in lorries or similar just lots of them. Im a huge advocate of using a battery trickle-charger or battery tender when you wont be driving your vehicle for extended periods of time and especially if that vehicle is a newer one packed with fancy electronics that get fussy if the battery powering them isnt in tip-top shape.

Clamp the red positive clamp of the battery tender over the positive battery terminal so that it wont come off without physically removing it. Battery tenders are designed for just that purpose they put a small trickle charge to more than make up for any self discharge of the battery plus any small loads like clocks security alarm and other always on items. Unless something is wrong with the battery it will be fine.