Energizer®
Energizer® Energizer A23 Battery x 1 S543 S543
Model S543
Best price
Lowest we’ve seenWhere to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked 4 hours ago | £1.10 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £1.94 | In stock | Visit Blueperry Tool & Builders Merchants (UK) (opens in a new tab) |
 checked 5 hours ago | £1.95 | In stock | Visit Tooled Up (opens in a new tab) |
Prices exclude delivery. We may earn a commission if you buy through these links, which never affects the ranking above — it is always cheapest first.
Price history
Full price historyThis is the lowest price we have recorded. If you were waiting for a drop, this is it.
About this product
The Energizer A23 is a compact 12V alkaline battery, measuring 28.5mm by 10.3mm and weighing around 8g, suited to small electronic devices where space is limited. It is also known by the reference codes K23A, MN21, LRV08, 23A and V23GA, giving it broad compatibility across brands. It suits devices needing short bursts of high power, such as car and home alarms, remote controls, garage door openers, keyless entry systems, wireless doorbells, Bluetooth headsets, security systems, calculators, lighters and laser pointers. It offers reliable performance in extreme temperatures, a leak-resistant design and a shelf life of up to five years, making it a practical choice for backup storage. Sold as a single 12V alkaline battery.
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