Seriously broke
Had I known this would have never purchased your batteries. After purchasing 3 GC2 batteries I can only bind one of them to manage. If I change the name of one battery the other two entries on the home page repeat the changed name with the same MAC address. Obviously a major failure.
Horrible
The app actually stops you from using the battery. Ghost codes on the app keep you from toggling on discharge button needed for power. NO customer service. AVOID!
Update didn’t work
Cannot connect to battery after latest update
It’s Broken
Latest version, 25.13.3 does not work. App crashes when Bluetooth connects to the battery.
Unreliable Battery Control
The recent update in March 2026 isn’t able to control “bound” batteries without a data connection. I had to take my batteries out of the camper and find enough data coverage to refresh the Bound Devices (batteries) and enable the outputs.
Watt THE HELL?
These batteries and app worked fine. Then the updates. Go to settings & see why nothing works battery parameter is max discharge temperature 149°F per manual, but in the app, it’s 32°F max temp and trying to fix any of these gives “out of range” notification. WHY DID YOU MESS IT ALL UP Watt Cycle?! All the parameters are wrong in settings tab and you can’t fix any of them!!
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Needs much more work
Please document what you changed just say fixes made doesn’t do any good
This app has been absolute garbage
I have not been able to reliably get any readings on my two 314ah smart batteries. It’s very disappointing. It seems both appear to connect, but give me no readings from the BMS. I bought these just before the issues with the BMS software surfaced. I just want to be able to use these batteries, wish they had the dumb batteries available when I bought these. They are heavy bricks right now.
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Removed App Functionality
App had the ability to turn off battery via Bluetooth without requiring an account. I don’t want to sign up for your marketing emails just to operate my battery.
No Instructions?
It would be nice if there were instructions for setting it up with my Smart Mini LiPo battery. And, something that describes what the buttons do would be nice. The app also seems to disconnect rather quickly. It would be nice to set a timer for when I am cycling/discharging the battery.
Missing or broken features.
It’s possible for the “charging” screen button to get “stuck” in the off condition and there is no state of charge history only real time information. Both are unacceptable.
Won’t create an account
Won’t let me create account. Pop ups are not in English. App is t functional.
Horrible App
This app rarely picks up my battery's bluetooth signal. It's basically worthless. Don't waste your time downloading it.
Laughably doesn’t give bare minimum fonctionalities
Worst UX ever. Shame on Wattcycle
Barely functional
Well, it works to at least see some limited information on your battery. I setup an account to “bind” my two batteries. Got logged in. Tried to bind my batteries. It said I needed to be logged in. Which um yeah I already am. Logged out and in again. Restarted app. Tried everything. Acts like it wants to bind after capturing serial number, but still says I have to login in the “bound batteries” section. It also pops up some kind of message in Chinese. It must say “F-you” since it just won’t work. Do you test your apps? I mean why even offer an account with binding? Also in general the app feels like it was made in 2002. Very hard to find info. Not intuitive. Anyways. Dumb.
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PIN protection missing
PIN protection missing!!!!
Good but could be better!
I have been using the WattCycle app with a 12V 100Ah Smart Mini Battery for about 2 months in a small camper. The battery and app have performed well in a low load (~0-10Amp) environment. There are 2 annoyances I will like to see addressed: 1. When connecting to a battery with Discharge disabled, Discharge is ENABLED automatically. 2. Remove the selection confirmation screen when selected the battery / device to connect to. This is an unnecessary step.
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Terrible
This app is awful! I don't understand how someone can release an app that doesn't work and with zero help on operation. It was like pulling glass out of my eye to figure out how to connect to my battery. Now, the discharge is what I think always on! I can't tell because there are NO instructions. I'm assuming that light blue is off but you know what happens when you ASSume! Even when I get it to turn to light blue, the next time I open it. It's dark blue again. Google search said to update the app but..... there are no updates. This is insanity. I wouldn't suggest this battery at all! Don't get one with the "smart" on it because it's definitely NOT!
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Works on all 3 mini’s
If You click on the voltage of the battery then it shows the cell voltage independent of each other. 4 voltages for 4 cells. Just clicked on the 13.5v next to the temp and it came up with all 4 cells voltages. I run mine in series and have had zero problems on the trolling motor for a year now. They have lasted an entire month without needing to charge them. Unheard of with lead-acid. And since I got them in January I beat the price increase. So at $130 for 100ah I am happy. App could be better but not the worst. If I never found the cell voltage by tapping the volts icon I would have been disappointed.
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Anfängliche Empfangsprobleme und fehlende Bluetooth-PIN
Nach auspacken der Batterie und Installation der App wurde die Batterie mit meinem iPhone 5 nicht gefunden. Ich dachte zuerst, das Bluetooth-Modul wäre defekt. Mit meinem alten iPad ging es aber. Erst nach einer Weile ging es auch mit dem iPhone 15, obwohl ich dort nichts geändert hatte. Sehr eigenartig!
Folgendes gehört unbedingt verbessert:
1) SEHR WICHTIG! Es fehlt die Möglichkeit, das Bluetooth des BMS mit einer PIN zu schützen! Das ist inakzeptabel, da es Sicherheitsrelevant ist. Jeder könnte von außen auf die Batterie azugreifen und kritische Werte umstellen!
2) In den Einstellungen sind die Werte in Fahrenheit angegeben/anzugeben. Wir Europäer können damit nichts anfangen!
Das sollte umstellbar sein, so dass die Werte in Grad Celsius angegeben werden bzw. eingegeben werden können.
3) Es wäre schön, wenn es eine Grafik gäbe, in der der zeitliche Verlauf der Ladung/Entladung über mehrere Tage, gegebenenfalls auch Wochen und Monate als Kurve angezeigt wird. Das wäre insbesondere eine Nutzung im Wohnmobil in Kombination mit einem Solaranlage. wichtig und hilfreich , um die Nutzung und die Ladung der Batterie im Setup besser einschätzen zu können.
Folgendes gehört unbedingt verbessert:
1) SEHR WICHTIG! Es fehlt die Möglichkeit, das Bluetooth des BMS mit einer PIN zu schützen! Das ist inakzeptabel, da es Sicherheitsrelevant ist. Jeder könnte von außen auf die Batterie azugreifen und kritische Werte umstellen!
2) In den Einstellungen sind die Werte in Fahrenheit angegeben/anzugeben. Wir Europäer können damit nichts anfangen!
Das sollte umstellbar sein, so dass die Werte in Grad Celsius angegeben werden bzw. eingegeben werden können.
3) Es wäre schön, wenn es eine Grafik gäbe, in der der zeitliche Verlauf der Ladung/Entladung über mehrere Tage, gegebenenfalls auch Wochen und Monate als Kurve angezeigt wird. Das wäre insbesondere eine Nutzung im Wohnmobil in Kombination mit einem Solaranlage. wichtig und hilfreich , um die Nutzung und die Ladung der Batterie im Setup besser einschätzen zu können.
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