Tenergy 9V Lithium Batteries, 1200mah Non-Rechargeable Batteries, 10 Years Shelf Life Lithium 9 Volt Batteries, 8 Pack

The Tenergy 9V Lithium Batteries are a reliable and efficient power source for devices that demand consistent performance. With their impressive capacity, long shelf life, and wide compatibility, these batteries stand out as a top choice for both everyday and emergency needs. Key Features and Benefits: High Capacity (1200mAh): These batteries offer 1200mAh, ensuring they last longer than standard alkaline 9V batteries. Ideal for smoke detectors, wireless microphones, and other high-drain devices. 10-Year Shelf Life: With an extended shelf life of up to 10 years, these batteries are perfect for stocking up. You can count on them to work even after long storage periods. Non-Rechargeable Convenience: As non-rechargeable batteries, they’re hassle-free—no charging required. Simply replace and use. Reliable in Extreme Conditions: Designed to operate in temperatures from -4°F to 140°F, these batteries perform well in a variety of environments, making them suitable for outdoor and indoor use. Leak-Proof Design: The sturdy construction prevents leaks, protecting your devices from damage. My Experience: I bought these for my smoke detectors, and they’ve exceeded my expectations. Installing them was easy, and they’ve been running flawlessly for months without any issues. I also tested one in a wireless microphone for an event, and it provided stable power for hours. The peace of mind from their 10-year shelf life is a huge plus. Pros: High capacity for extended usage. Long shelf life makes them great for emergencies. Reliable in extreme temperatures. Leak-proof and safe for valuable devices. Well-suited for various applications. Cons: Non-rechargeable (not ideal for frequent battery users). Slightly pricier than standard alkaline batteries, but worth it for the performance. Final Thoughts: The Tenergy 9V Lithium Batteries are a smart investment for anyone seeking long-lasting and dependable power. Whether for essential devices like smoke detectors or high-demand gadgets, these batteries deliver outstanding performance. Their durability, extended shelf life, and consistent reliability make them a must-have for your home or emergency kit. Highly recommended!

Really nice set of batteries that recharge during the day and light up at night.

I'm intrigued by lithium primary batteries, for devices where you change batteries yearly or even less often. There's much less risk of a leaking battery damaging the device, than with an alkaline. (If you change the battery more often, you may want a rechargeable. But rechargeables have some self-discharge, so they don't last as long in very-long-battery-life devices, like remote controls, or sporadically used tools.) I was intrigued enough to buy an Energizer Ultimate Lithium 9v when I saw it at my local drug store, even though it was over $20 USD for one, which is not economical. But there are a surprising number of devices where it just doesn't quite fit! And it's because it's boxy, with sharp corners. Often 9v battery compartments have at least 1 slightly rounded edge, and the sharp edges of the Energizer means it's pushed a half millimeter too far away from that edge, and it's uncomfortably tight, and stressing/bulging plastic doors or clips etc. This product, the Tenergy 9v Lithium, is described as being slightly small so to fit better, and the edges look rounded. Also it's much more reasonably priced. So how is it? It's better! Still a slightly tight fit in some devices, but significantly better. I got out a digital caliper to try to confirm the cause. The LxWxH of this Tenergy is actually not smaller than the Energizer Lithium, it's 0.1 to 0.2 mm larger, but so is a energizer Alkaline. But the max diagonal length, as suspected, is 0.7 mm less on the Tenergy than the Energizer Lithium, because of those rounded edges. An energizer alkaline is another 0.7 mm less diagonal than the Tenergy, I guess alkaline is even more rounded still. Both of the Tenergy Lithium batteries I received provide 9.5V with a 17 mA current draw (9.7V unloaded). So far looking great, long term we'll have to see. For the better fit and better price, I really like these.

These did not last as long as there competitors. Seem to die in about half the time.

These batteries are great for battery powered smoke detectors. The batteries last longer than other kinds of 9 volt batteries so you don't need to replace them as often. This gives better peace of mind for safety in your home.

Fits perfectly and works well

I have been using these in the field. My normal go to 9volt batteries tend to last only a few hours with my equipment. These batteries are lasting all day of useage. Very happy them. Pricey comparing to most batteries, but being lithium, a good value.

Starting voltage was 9.78 vdc, impressive. They fit perfectly on my Paklite flashlight and very bright. Given the very low draw (about 20 ma) one battery should last well over a year, maybe two. Half the price of Energizer, and should last at least as long.