Need to make sure your system keeps running in the event of a power spike or outage? Fit this UPS replacement battery cartridge from APC and you can rest easy knowing your electrical setup is in safe hands. The unit contains four sealed lead-acid batteries that give you 84VAh of uninterrupted power. The cartridge is hot-swappable, so there's no need to waste time powering down your equipment during setup. Plug-and-play installation means setting up your UPS is hassle-free.

• Suspended electrolyte makes it resistant to vibration, so it's suitable for shock-prone environments
• Battery life of 3 to 5 years makes it a long-term solution
• Enclosed battery cabinet guards against contamination

• Small-scale computer networks
• Residential electrical systems
• Medical settings

A lead-acid battery is a rechargeable battery that uses a chemical reaction between lead and acid to produce electricity. The reaction is then reversed to recharge the battery. Lead-acid batteries have a low self-discharge rate so there's less risk of them going flat.

UPS stands for uninterruptible power supply. Most commonly, it uses energy stored in batteries to enable a computer to keep running when incoming power is interrupted, meaning there's no costly downtime and vital processes aren't halted.