Litimon

Live Bluetooth monitoring for LiFePO4 smart batteries.

Free on the App Store.

What it does

Litimon connects to your LiFePO4 smart battery over Bluetooth and shows what the built-in BMS knows: state of charge, power flow, voltage, current, per-cell voltages with balancing activity, temperatures, cycle count, and protection flags. Monitor up to four batteries at once, each with its own live glance card. Monitoring is read-only: the app never writes to the battery.

Getting started

Turn on Bluetooth and stand near the battery, then tap the Connect card and pick your battery from the system picker (LiTime names look like L-12100BG-A00123).
The battery appears as a live card: charge, power, and status at a glance. Tap the card for the full page with cells and temperatures.
If the link drops, Litimon reconnects by itself when the battery is back in range. The card menu (⋯) has manual Connect / Disconnect.

FAQ

Which batteries are supported?
Litimon speaks the Bluetooth BMS protocol used by the LiTime / Redodo battery family (not the JBD/Xiaoxiang protocol some other brands use). So far it has been tested with real LiTime batteries (12 V and 36 V models). Other brands built on the same BMS platform - Redodo, Power Queen, Starry Sea - are likely to work but have not been tested yet. Litimon is free, so the quickest check is to just try it with your battery.

Does it send my data anywhere?
No. Litimon talks only to your battery over Bluetooth. Your battery list stays on your phone; there are no accounts, no analytics, and no network requests - see the privacy policy.

My battery does not show up in the picker.
Only one phone or app can be connected to the battery at a time - close the vendor app or disconnect other phones first. A battery in deep sleep or protection shutdown does not advertise; wake it per the manufacturer's instructions (usually a charge pulse).

Live updates stopped.
Walk back into Bluetooth range and give it ~15 seconds; Litimon reconnects and resumes on its own. If a battery misbehaves, open its page, unfold the advanced section at the bottom, and use the troubleshooting report (Copy report / Save .txt).

Support

Questions, bugs, feature requests: email me@yurasov.me. Please include your iPhone model, iOS version, battery model, and if possible the troubleshooting report (battery page > advanced > Copy report).