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Ultimate9 Bluetooth Battery Monitor


- Wireless battery monitoring via mobile device 
- Monitor multiple batteries with the one app 
- Bluetooth connectivity, free app for iOS & Android (Ultimate9 BM) 
- Receive notification of your battery condition via the app 
- Short circuit and reverse connection protection 
- Data stored for up to 31 days if out of sync 
- Review and store historical data 
- Records trip duration 
- Simple, cheap and effective protection 

Monitor the health and charge status of your vehicle batteries via your smartphone with the new Ultimate9 Bluetooth Battery Monitor and Ultimate9 BM app.

Monitoring your vehicle batteries is easy with the Ultimate9 BM app and Bluetooth Battery Monitor. Simply install the battery monitor to your battery positive and negative terminals, download the app via the Apple App Store or Google Play by searching Ultimate9 BM, or scanning the QR code on the Battery Monitor label. Turn on the app, and the app will locate and show your battery status.

The Bluetooth Battery Monitor can be installed neatly on top of your battery. The 8mm forked cable lugs allow attachment to the battery terminals without having to remove any bolts, just loosen and slide the fork under the nut/bolt and re-tighten. This ensures there is no requirement to disconnect the battery and reset any radio codes etc.

The Ultimate9 BM app is simple to use, and not only monitors battery voltage, but will run cranking and charge tests as well as including a trip function to monitor charging periods while you drive.

The Ultimate9 app can monitor up to 4 batteries and each can be given a custom name, for example; Main, Auxiliary, Caravan, Bike, etc.

The Ultimate9 Bluetooth Battery Monitor is designed to monitor 12V batteries as fitted to cars, SUVs, motorcycles, boats, motor homes, caravans, camper trailers, etc.

It is compatible with lead-acid type batteries including; Flooded, Sealed Lead Acid (SLA), Calcium, Absorbent Glass Mat (AGM), and GEL.

Comprehensive instructions are included and can also be accessed digitally via the settings menu under ‘Hardware installation’.

A separate version for Lithium batteries is currently available here

*Please note, this battery monitor is for lead acid batteries only


After sales support

One Year Local Warranty

30 day money back guarantee - we guarantee you'll love it or you'll get your money back

Customer Reviews

Based on 1 review
Greg Forrestal
Time to test

After installing the Ultimate 9 on my house battery in our small trailer sailer about 4 weeks ago it has proven very reliable and simple.
The app allows me to get instant access to the battery status without having to climb aboard.
Will probably buy another a second battery.