When connecting a charger the SOC number immediately changes to something different. It appears to work best when connecting a "rested" battery and then monitor the discharge profile.
Never really know what the "real" state of the battery is with numbers shown. Timers are another feature that didn't seem to follow what the data sheet says. Nothing changed the almost static reading 4 digits. Tried different wiring on TS terminals and cut the jumper. Battery Temperature measurement doesn't seem to be reading anything that I can tell.
Current and Power measurement are also great with polarity and 5 digits of resolution. Other lithium battery chemistries with lower voltage maximums will not work and will experience an over-voltage event if they're used with this.īattery voltage measurement resolution is great at 3 decimal places to the right. > Sparkfun: Please note in the product description that this device is ONLY for use with batteries that have a max voltage of 4.2V. (Don't keep your phone or laptop at 100%! Cycle it every day and let it "die" every once in a while).
Arduino lipo battery monitor full#
LiFePO4 doesn't mind sitting at full charge for long times, unlike other lithium chemistries which will degrade faster if they're not exercised and if they're kept at full charge.
Glad I read that before plugging it in to those batteries.įor anyone who's curious about the differences in chemistry, you should use a LiFePO4 chemistry for use-cases where the device will mostly get power from elsewhere (like the wall) and the batteries will be sitting at full charge for long periods of time without being exercised. Unfortunately my project requires LiFePO4 which has a max voltage of 3.6V! There is no way to modify the output of this device to intercept the 4.2V and drop it down to 3.6V without making all the other features of the device basically pointless.
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