Philips Ultra C Alkaline Batteries (LR14) – Pack of 20 (£11.55 / £10.97 max S&S)

Philips Ultra C Alkaline Batteries (pack of 20) are down to £11.55 at Amazon, about 31% below their typical price of around £16.83, and this is the lowest Amazon price in the last 90 days. That works out at under 58p per battery. Sold and dispatched by Amazon, rated 4.6 out of 5 from 488 reviews.
Key features from the listing:
Powerful performance: reliable, long-lasting power for high-drain devices like torches, radios and power tools
Versatile use: ideal for any electronics that take C batteries, including torches, boomboxes and toys
Leak-proof design: built to help prevent leaks and protect your devices
Convenient pack: 20 batteries in one pack, great value for large households or anyone who goes through a lot of batteries