Replace batteries less often—these batteries last at least twice as long as standard sealed large-cell batteries. Use them to provide backup power for emergency lights, alarm systems, uninterruptible power supplies (UPS) for computers, and other systems that require power over a long period of time. All are dry cell, so they have an absorbed glass mat (AGM) that soaks up the electrolyte and can be used in any position except upside down. They can be recharged hundreds of times.

Warning: Batteries should always be charged and discharged in a ventilated area.

An alternative to wet- and dry-cell large-cell batteries, these lithium iron phosphate (LiFePO4) batteries charge more quickly and can be recharged thousands of times. With excellent chemical stability, they reduce the risk of thermal runaway if exposed to overheating or short circuiting. Use them for uninterruptible power supplies (UPS) and emergency lights.

Note: These batteries must be used with LiFePO4-compatible chargers.

Chargers—Chargers automatically switch from fast charging to maintaining the charge level, so they won’t overcharge and damage the battery.

Battery cells are wired together for use in emergency lighting, such as exit signs.