BMS Lithium Monitor

BMS Lithium Monitor turns your phone into a live battery monitor for lithium batteries with a Bluetooth smart BMS. Connect in seconds and see exactly what your LiFePO4 or Li-ion battery is doing: every cell, current, temperature and alarm, in real time.

Whether you run a LiFePO4 house battery in a camper van or RV, a solar battery bank, an off-grid power wall, an e-bike, a golf cart or a marine battery, BMS Lithium Monitor shows the live data your battery management system has been hiding.

LIVE DASHBOARD
• Animated state-of-charge dial with charging and discharging energy flow
• Pack voltage, current, power and remaining / full capacity (Ah)
• Runtime estimate: time to full while charging, time left while discharging
• Charge and discharge MOSFET status at a glance
• Swipe between up to 4 connected batteries

CELL VOLTAGE MONITOR
• Every cell voltage in a live cell map (4S to 16S and more)
• Highest cell, lowest cell and pack delta (mV) with balance status
• Balancing indicators show which cells are being balanced

TEMPERATURE AND PROTECTION ALARMS
• Every NTC temperature sensor, in °C or °F
• Alerts for protection trips, low battery and high temperature
• Alarms keep working in the background with a monitoring notification
• Protection event log with timestamps

HISTORY AND EXPORT
• State of charge, voltage, current and temperature history charts
• Charge and discharge sessions
• Export your battery data to CSV

SAFE BMS CONTROL
• Switch the charge and discharge MOSFETs, with confirmation
• Read and edit protection parameters: cell and pack over/under-voltage, over-current, temperature limits, balancing and capacity
• Every write is range-checked, confirmed and verified by read-back
• Back up and restore your BMS parameter settings

DESIGNED FOR DAILY USE
• Clean, modern interface with live animations
• Light, dark and system themes
• No account, no sign-up: your battery data stays on your phone

COMPATIBILITY
Works with lithium battery packs that use a Bluetooth smart BMS speaking the common JBD protocol (widely sold as Xiaoxiang-app compatible and used by many LiFePO4 battery brands). Requires Bluetooth Low Energy.

Bluetooth permission is used only to find and talk to your BMS. The app does not track your location.

BMS Lithium Monitor is an independent app. It is not affiliated with, endorsed by or sponsored by any BMS or battery manufacturer; all trademarks belong to their respective owners.

Monitor your lithium battery the smart way. Download BMS Lithium Monitor and see every cell, live.