Yuasa Yu-Lite ER34615D 3.6V Lithium D Cell Battery, 19000mAh, Non-Rechargeable

Overview

This is a single 3.6V lithium cell in D size from Yuasa's Yu-Lite range. The range is made for applications where long life and dependability are critical.

It is a primary cell, which means it is used once and replaced, never recharged.

How it works

Lithium thionyl chloride cells hold a lot of energy for their size and lose very little charge while waiting. That suits devices that sit for years drawing a small current, with short bursts when they transmit or sound.

Where to use it

Typical homes are wireless alarm systems, wireless fire devices and emergency lighting units that specify a 3.6V lithium D cell.

What the figures mean in practice

• 19000 mAh: a large store of energy, which is why a device built around this cell can run for a long time between changes.
• 3.6 V: a higher voltage than common household cells, so always check the device label before fitting a replacement.

Installing it

Match the polarity marks in the battery holder, and fit fresh cells as a set where a device takes more than one. Never charge, short or open a lithium cell.

Take spent cells to a battery recycling point rather than general waste.

Planning your system

Note the change date on the device, and keep spares in a cool, dry place. The guide to replacing alarm batteries covers safe swapping on intruder systems.

Other cells are in the specialist and industrial batteries range, and more Yuasa batteries cover standby and cyclic needs.