Only reason it doesn't get five stars from me is I have an older Android 7 phone (Nexus 6) which is not supported by the BMS Meta app. I was able to get it working on a Kindle fire 7" by using a free app called Fake GPS. This was only possible after "jailbreaking" the Kindle and enabling google play store (a technical process which is difficult for many). If you have an obsolete phone this may be an issue for you and I did not feel like I should have to purchase a whole new phone just to watch the battery's behavior. I purchased after watching teardown videos on youtube to confirm build quality and safety features. Really, this is a five star battery for anyone not using an obsolete phone. After a few weeks, I liked it enough to buy a second unit and hooked them up in parallel for 200 amp hours.
I needed an affordable large amp hour battery in a small package. The 12V 280Ah Wattcycle Mini was the right match. This battery went in to a tight fitting Airstream Basecamp 20X trailer battery space. I did not need to make any modifications. I installed it with no issue and put a fuse in place to protect the electrical system. On three-night winter trip in the Oregon Cascades and with temperatures well below freezing, the battery easily was up to all the tasks: propane heater fans, roof vent fan, lights, 12v fridge and device charging. (I am also happy about having low temperature protection for the battery). The 300w solar panels were shaded by clouds much of the time. Thankfully, on this batteries maiden voyage it performed perfectly. Having had battery power anxiety so many times when traveling, it was great to spend more time enjoying the adventure travel experience without sweating about the battery. My next battery related purchase with be the Wattcycle 60amp charger for those rare time I want to fast charge the Mini from an outlet. For now, I look forward to many, many years of service from the battery.
I’ve been very pleased with the product and would definitely recommend
Came packaged nicely no issues. Nice they included both bolt sizes if you have two cables on the terminals. Put two of them in my rv and have worked great so far. Would love to get a bigger charger. Maybe one day.
Accidentally put this in the 'shop' reviews...
Sorry.
It belongs here, in the product review section.
I have eight of these batteries, some purchased in October 2024, and the rest in November of 2024. The battery bank is connected as two in series for 24 volts, and the four strings of those in parallel for 400 amp hour via individual breakers.
They have all performed FLAWLESSLY up until about a month ago, when I started having trouble with the Bluetooth app after it was updated.
Now, seven of the eight work fine, but I can't get any data from the one battery. It shows up in the scan lists, says it has connected, but no information comes up on the app. I decided to check its voltage thinking that if the bluetooth didn't work right, and I could still just run it in the bank as if it was a battery without bluetooth and I'd monitor it with a voltmeter or use the Victron shunt isolated auxiliary voltage input that is designed to monitor other batteries at the same time as it 'watches' the main battery bank.
Grabbed the voltmeter and the voltage was way off.
The bluetooth app still 'sees' the battery and says it's connected, but no data posts on the app.
I've isolated it and tried charging it with a bench power supply, (set to multiple voltages from 12.8 up to 14.6 volts,) and it won't take a charge, nor will it source any current to a load. A high impedance voltmeter (20 Meg Ohm) shows 5.5 volts, but when any load is placed across the battery, the voltage drops to zero. (I use a 120v 250w incandescent bulb with clip leads to 'pre-charge' the inverter input caps before closing the battery breakers to avoid damaging circuit breaker contacts with the high inrush current,) and I placed it across the battery terminals. The voltage drops to zero.
So, something has gone sideways with not only the bluetooth, but the BMS apparently has a problem as well.
I'm waiting for instructions from Wattcycle on how to proceed, but with that battery down, I've now lost 1/4th of my battery bank capacity.
I purchased the WattCycle 12V 280Ah MINI LiFePO4 battery for my solar power system. It has significantly improved the efficiency of my setup. The battery provides steady and reliable power even on cloudy days. It's easy to install and manage, and I love how compact and lightweight it is compared to other lead-acid batteries I’ve used.
I’ve been using the WattCycle 12V 280Ah MINI LiFePO4 battery for my off-grid cabin, and I am extremely impressed. The battery holds a charge well and lasts throughout the day with all my appliances running. It's a compact design with high capacity, which is exactly what I needed. Highly recommend it for anyone looking to power their off-grid systems!
Battery is nice but the BMS Meta app quit working just a few days ago. I don't understand why it requires a connection to a Chinese server when it only needs local Bluetooth access. Please fix the app.
Replaced damaged battery at no cost.
I just ordered a WattCycle 12V 300Ah MINI LiFePO4 Battery. But I was worried after seeing many people complain about the top cover. It happened that WattCycle launched the Bluetooth model. After negotiation, I changed to the Bluetooth model of 12V 280Ah MINI. At the same time, the $50 discount originally for the 12V 300Ah MINI was transferred to my Bluetooth model. I am very grateful to WattCycle. After understanding my concerns, WattCycle promised me that if the top cover falls off, they will refund me or reissue it. I am looking forward to my Bluetooth model.
A good product, I'm getting another one.
This battery last me eight or nine days before recharging.
Great power storage in a small package!
I had two 100ah AGM batteries before these and they took forever to charge and I was always watching my battery die too fast now I have these batteries the two of them weigh less than one of my previous batteries and when camping this weekend I never got a low battery alert
A lot of people started to worry about the top falling off, and WattCycle responded immediately. They started to offer insurance. I only had to pay a few dollars to buy insurance. If the battery was damaged during transportation, I could skip WattCycle and claim directly from my insurance company. That was great, and I was happy with the service. After all, shipping damage cannot be completely avoided.
I received my WattCycle 12V 300Ah MINI LiFePO4 Battery last month. Although, it has now become a WattCycle 12V 280Ah MINI LiFePO4 Battery. I have to say that I was confused, confused and disappointed at first. However, after understanding the ins and outs of the matter, I don't regret my choice. I am willing to give WattCycle a chance. I have no problems with my battery during use, but even so, WattCycle directly refunded $50 to my account. That's why I am commenting here now.
Powers my solar system effortlessly. Lightweight and compact. Overcurrent protection offers peace of mind.
The battery’s top cover was loose when it arrived, but WattCycle’s support team handled the issue promptly. They sent a replacement, and the new battery has been performing exceptionally well in my solar power system. It’s been a month, and no issues so far. Highly satisfied!
My WattCycle battery arrived with the top cover opened, likely due to rough handling during shipping. I contacted their support team, and they were incredibly responsive. They offered a refund or a replacement, and I chose the latter. The new battery arrived in perfect condition, and it’s been performing flawlessly for weeks now. Great service and a great product!
EVE cells deliver outstanding energy density. Lightweight and easy to handle. The overcurrent protection works great.
Installed this in my off-grid cabin. Compact size and high energy density exceeded my expectations. It powers my appliances smoothly, and I feel safe with the overcurrent protection. I’ll be upgrading to Bluetooth when available.
I’ve used this battery in my solar setup for a month now. The EVE cells are efficient, and the lightweight design makes handling easy. Overcurrent protection is a great safety feature.
The battery was damaged during shipping, with the top cover coming loose. I contacted WattCycle, and they resolved the issue quickly by sending a replacement. The new battery has been performing exceptionally well in my off-grid cabin. No complaints at all—great product and service!
Runs my appliances for days without a recharge. Overcurrent protection is a nice safety feature. Looking forward to the Bluetooth model.
Unfortunately, the battery’s top cover was loose when it arrived. I reached out to WattCycle’s customer service, and they handled the situation professionally. They sent a replacement immediately, and the new battery has been working perfectly. It’s been powering my RV without any issues. Highly recommend their service!
EVE cells provide consistent power for my off-grid cabin. Small size fits snugly in tight spaces. Highly impressed with performance so far.
