12V 100Ah Bluetooth LiFePO4 Battery for Rv, Trolling Motors, Boat

Great battery for the price, this is a high quality, prismatic cell LiFeP04 battery that wont let you down. The app is easy to use and I've never had a connection issue, I can disable charge and discharge, check remaining life, cell balance, and more. I highly reccomend Hey Future as a solid less expensive alternative.

Great battery so far. I use it to power a water transfer pump to water my yard plants. I can water for 3 hours and only use 10 percent of the battery! The old car battery I used would be almost dead at that point. The Bluetooth can take a few tries to connect but I love the ability to switch the charge and discharge off through Bluetooth!

Very good battery so far.. have 30 cycles on it. Love the blue tooth feature. It's great to see what is actually happening to the battery.

Seems to be as advertised. Installed 2 in parallel in my camper. Haven't got the Bluetooth up yet but that's most likely my fault. Voltage is great and seem to work well. Had to change my converter to lithium style from lead acid style.

reached out to the seller about intermittent shut offs on the battery. Diagnostics revealed one of the cells was bad. They immediately resolved the issue by replacing the battery.

The good: The battery is built better than expected for the price. It uses a proper molded cell frame, substantial welded busbars (would have preferred bolted), decent insulation, temperature sensing, and a reputable JBD 100A smart BMS with Bluetooth and balancing. The bad: The actual cells are unbranded, so their quality, age, cycle life, and true capacity are unknown. The internal assembly is somewhat messy, there appears to be no internal fuse (very common in budget packs, not an issue at all, you should have it fused externally regardless), and the 4S2P layout means the BMS cannot detect problems with each individual 50Ah cell (again not a huge issue, the 4S2P layout does have it's own benefits). Any of the little elephant apps should work, screenshot are from JBD BMS. Pack is also sealed with a silastic type sealant so it's waterproofing relies on the application of your specific pack. It does come with both standard and long fasteners although you should not be stacking cables on the battery terminals instead of a proper busbar.

Love this battery, I used it on a 12’ Pirouge with a 36lb thrust trolling motor and I don’t think I ever got it below 85% and I ran the hell out of it. Plus it charges quick. Not to mention it is so light!!

Update: 1 of 2 batteries - lasted only 6 months with very little use. Won't charge. Internal resistance went from 3.12 ohms to 200 ohms. It will take a charge to 95% (13.5 volts). But discharges to 60% (12.9 volts) in a few minutes used in series with other battery still at 95% SOC. Also - the App stopped displaying the internal cell volts for either battery (one still performing OK) Purchased 2 smart batteries for my 12v Solar Battery Storage system (maybe 24v later) to run in parallel. I like having a view into the individual cell voltages and the Blue Tooth monitoring feature works great excepting one caveat: I tested the batteries after a slow (10A) LiFePO4 4 phase charger, to 100% charge (about 4 hours) and left both 12 hours to balance out together. I used an Internal Resistance tester (open circuit) to match with the BlueTooth App. Batt1 BMS voltage reading spot on. Batt2 BMS voltage reading was 1.4% higher by .20 volts (also 0.05v per cell). The BlueTooth app provides a Voltage Calibration function and I set the BMS voltage by subtracting 50 mV (0.05v). Batt2’s BMS battery voltage now matches my IR tester’s: Batt1: 13.43 volts and voltage difference between cells = 0.005v. Perfect. Batt2: 13.46 volts and voltage difference between cells = 0.113v (0.008%). AI says a high-lo cell difference below 0.2v is acceptable. FYI: Using an open Internal Resistance test: Batt1 = 3.14 mOhn Batt2 = 3.11 mOhm. Lower is better. I now have a baseline to yearly monitor overall battery health. A good start...