CertaUPS C500, Installation Manual

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7.4 Replacing batteries
DO NOT DISCONNECT the batteries while the UPS is in Battery mode.
Consider all warnings, cautions, and notes before replacing batteries.

Servicing should be performed by qualified service personnel
knowledgeable of batteries and required precautions. Keep unauthorized
personnel away from batteries.

Batteries can present a risk of electrical shock or burn from high short circuit
current. Observe the following precautions:
1. Remove watches, rings, or other metal objects,
2. Use tools with insulated handles,
3. Do not lay tools or metal parts on top of batteries,
4. Wear rubber gloves and boots.

When replacing batteries, replace with the same type and number of
batteries or battery packs. Contact your service representative to order new
batteries.

Batteries must be disposed of responsibly. Refer to your local regulations
for disposal requirements.

Never dispose of batteries in a fire. Batteries may explode when exposed to
flame.

Do not open or modify the battery or batteries in any way. Released
electrolyte is harmful to the skin and eyes and may be extremely toxic.

Determine if the battery is inadvertently grounded. If inadvertently
grounded, remove source from ground. Contact with any part of a grounded
battery can result in electrical shock.

The likelihood of shock can be reduced if grounds are removed during
installation and maintenance (applicable to equipment and remote battery
supplies not having a grounded supply circuit).

ELECTRIC ENERGY HAZARD. Do not attempt to alter any battery wiring or
connectors. Attempting to alter wiring can cause injury.

Disconnect charging source prior to connecting or disconnecting battery
terminals.