This is the greatest battery I've ever had. It not only holds a good charge, but provides probably more power than a normal 50 Ah Battery. I'm very pleased to report this, and really want to encourage others to get this one. It is very reasonably priced on Amazon, and I'm so glad I bought it!

Powered my sonar forward facing sonar unit all day long.

Light, compact, fast recovery. Great product

Bought a few years ago just now leaving a review, this lil battery powers my trolling motor just fine,holds a charge good👌👌

My batteries were taken from the front yard they replaced them immediately and I'm completely happy with them

These batteries initially test good but after a few weeks they fail, draining my entire battery Bank. Disconnect the BTR power batteries and the system will work properly again. I will never buy another BTR brand battery. I have a few of these now, maybe I can make one good battery out of the three bad ones. The seller will send you another one if it fails within the 30 days. I learned my lesson. I'm only buying siekon batteries now.

Bought 4 of these when the original lead acid batteries in my zero turn Ryobi mower started losing capacity during year 4 of use. To my surprise, the originals lasted over a year longer. So I'd had these replacement batteries over a year before installing them (kept them topped up while stored on my work bench).Once installed in series, the batteries produced 52v, but immediately upon starting the blades or trying to drive the mower, the voltage would drop to about 40v and the mower would have to be reset by connecting the charger (it's safety mechanism to prevent running the mower at too low voltage).After extensive troubleshooting, and even unnecessarily replacing some parts, I discovered that one of the batteries was faulty; would immediately interrupt the floor of current with any attempt to charge or when applying any type of load, which fit with what I experienced trying to use the mower.I contacted BTR by email and got a reply within hours, They offered a prorated refund even though the batteries were a few months beyond warranty.So I ordered this replacement, reinstalled the three originals with it, and voila... Works like a charm!Now the mower feels more powerful than it ever was with the original batteries. Mowed about 3/4 acre of moderately thick grass and only consumed 25% of the battery, which is more capacity than the originals had, as well.Hopefully, these will last for many years as I really like the mower.

I recently decided to upgrade my boat's power system, and after extensive research, I opted for a LifePO4 battery. After several months of use, I can confidently say that this battery has exceeded my expectations in terms of reliability, performance, and longevity.The LiFePO4 battery capacity is significantly larger than old lead-acid batteries. I can now roam my boat around the lagoon for hours and never worry about running out of power. This battery consistently delivers a stable and consistent energy supply, ensuring that all my onboard systems operate smoothly throughout my journeys. The peace of mind this reliability offers is truly invaluable.The standout features of the LifePO4 battery is its impressive lifespan. Unlike traditional lead-acid batteries, the LifePO4 chemistry is designed to endure countless charge and discharge cycles without significant capacity degradation. I have noticed minimal decline in performance, even after numerous trips and extensive use. This longevity not only saves me money in the long run but also reduces the hassle of frequent battery replacements. The biggest benefit is it no longer needs adding distilled water every few month -- a major hassle with lead-acid.Moreover, the LifePO4 battery's fast charging capabilities have been a game-changer for me. It efficiently absorbs power from my boat's charging system, allowing me to replenish the battery quickly. This means less downtime and more time enjoying my boating adventures. Additionally, the battery's low self-discharge rate ensures that it retains its charge even during periods of inactivity, making it ideal for occasional boaters or those with seasonal use.Safety is paramount when it comes to marine batteries, and the LifePO4 battery delivers in this aspect as well. Its stable chemistry significantly reduces the risk of thermal runaway, which is particularly crucial on a boat where safety is paramount. I feel confident knowing that I have a reliable and secure power source on board. However, the original lead acid charger did not work for this batteries and I have to buy new one designed for my setup (48v). You can buy very inexpensive charger if you don't care to charge batteries quickly, I usually use boat on weekends and my setup takes about 20 hours to charge 200Ah battery.Lightweight design of the LifePO4 battery, it occupies same space on my boat but has significantly reduced the overall weight compared to my previous battery. This not only improves the vessel's balance but also makes installation and handling much more convenient.I think the LifePO4 battery has proven to be an excellent investment for my boat. Its remarkable reliability, longevity, fast charging, safety features, and compact design have made it an indispensable component of my boating experience. I wholeheartedly recommend the LifePO4 battery to any boat owner seeking a dependable power source that stands the test of time.