Best 12V Batteries of 2025

"As a parent of a 2-year-old, I often go through a lot of batteries for his toys, so I decided to try Amazon's AA batteries. I'm pleasantly surprised by their performance; they are absolutely comparable to well-known brands like Duracell and Rayovac. I haven't encountered any issues such as dead-on-arrival batteries or swelling. The price is excellent, making them a great value for keeping my son's toys powered up."

"I found this Amazon brand to be consistently cheaper than others, but my only slight complaint is that they don't last as long. Overall, they are good to use and serve my needs well."

"These batteries have been tested against pricier brands and have proven to be the best value. For everyday items, I confidently choose this brand as they work just fine."

"I was very pleased with the quick delivery and the price. The Amazon delivery man was courteous and ensured the package was protected from the elements. I found the 5-pack to be a great deal compared to searching for a single 12V Alkaline battery in stores. I appreciate the hard work of your employees; they truly deserve better pay and benefits for their dedication."

"Locally, I couldn't find these batteries, but the size was just right for my device. It's nice to have extras available, and they performed well at a decent price."

"These batteries work as expected, which is the most important thing. Though it's my first time purchasing them, I bought a multiple pack at a good price, so I have backups ready."

"I received my batteries, and they were fully charged and worked perfectly. They matched the brand and model of the originals in my Bruno chair lift, which had lasted about 9 years. I'm hopeful these will last just as long!"

"Our 3-year-old kid's tractor needed a new battery, and my daughter was ready to buy a new one. I decided to search for a replacement instead, and after about 30 minutes, the tractor was running like new!"

"I needed a replacement battery for my ION Explorer Outback 2 speaker because the original wouldn't hold a charge anymore. I found this Mighty Max battery, which was highly recommended by another reviewer. It fit perfectly, arrived fully charged, and worked right away! I hope it lasts a few years, but for now, I'm thrilled to have my speaker functional again!"

"I found this battery to be very lightweight and reasonably priced. Their customer service is incredible—I had a great experience working with them!"

"After using this battery for POTA activations, I appreciate how lightweight it is and that it can run for several hours while drawing ~20A. It charges quickly in about 3 hours. However, I think slightly larger terminals would make connections easier."

"I installed this LiFePo4 battery in my UPS 550, and so far, it has been working excellently. The UPS recognizes it and charges without issues, and it handles power loads smoothly. I feel this is a solid option for a replacement."

"I found these great durable batteries that last long. They fit perfectly in my garage door sensor and were exactly what I needed. A fantastic value for the money! I will definitely purchase again!"

"As someone who enjoys gadgets, I can say that the Energizer A23 batteries really light up my devices. They power everything from cameras to remotes. Plus, I appreciate the zero mercury feature for the planet!"

"I tested these batteries with my volt and amp meters, and they performed the same as I’m used to in Toronto. There's a small price difference, but for me, it's worth the time savings of not having to go out to buy them."

"I find the VONIKO Alkaline Battery 23A to be my top choice for powering my doorbell. They offer consistent performance and their long-lasting nature means I rarely have to replace them. Plus, the pack of six is super convenient!"

"These batteries work really well for my TV remotes and clocks. I appreciate the great price and the quick shipping!"

"I purchased a larger pack, which was cheaper. I'll see how they perform after six months, but so far, they are holding up well!"

"So far, this battery works great! It was actually a 3/4 inch wider than the original rt1255h, but it still slid in. The larger size gives me 9ah vs 5.5ah, making it operate much better with my 500W computer/monitor load on a 650VA UPS. Plus, it’s a bargain price compared to the $42 battery from BatteriesPlus!"

"I’ve had my APC for 3 years, and the battery started having issues. I was wondering if there was a timer in it or something. Anyway, the MightyMax ML9-12 was a perfect replacement, and I really love it!"

"Installation was straightforward after I googled how to replace the battery. I removed the screws and, with a little effort, got the old battery out. The new one came with an 80-85% charge, and after charging overnight, it was 100% in the morning. I tested my Pathfinder 2 speaker, and it turned on perfectly. Just remember to exercise the battery by depleting and charging it regularly!"

"I've found these batteries to be very inexpensive for my special devices. After using them for a few weeks, they’ve lasted well, and I typically get about four months of daily use before needing replacements. I'm really pleased with their performance!"

"It’s hard to locate these batteries at a reasonable price in my area. This brand is one I’ve used before, and I can attest that they do a good job."

"These batteries seem to offer the best prices around and match the lifespan of name-brand options. I encountered a quick drain issue on my garage remote, but I'm unsure if that was due to the batteries or the remote itself. In other devices, they work really well."

"I received a 1200 amp EverStart jump box that was originally dead. After replacing the battery with this AGM, it cranked my garden tractor without issues. It’s impressive how long it cranked even after the 'low battery' light came on. I’m optimistic about its longevity!"

"This Mightmax battery arrived in pristine condition and fit perfectly in my generator. It cranked immediately upon installation. I'm so pleased with the purchase that I'm considering getting another for an old jump starter!"

"I'm a seasoned user of rechargeable batteries, and the ML18-12 has impressed me with its sturdy design and reliable performance. It consistently delivers power for my backup systems and essential electronics during outages. Definitely worth the investment!"

"I purchased these batteries after my UPS stopped holding a charge. The original CyberPower batteries were quite expensive, but these had the same specifications. Installation was straightforward, and now my UPS works like new!"

"After the batteries in my UPS failed, I considered buying a new unit. However, I realized that the model hadn't changed in over a decade. Instead, I replaced the batteries for a fraction of the cost, and everything has been running great since then."

"I’ve been using these batteries in my UPS for about a year now, and everything has been trouble-free. I did hear some complaints about the connectors being small, but I had no issues as long as I connected them correctly."