(27 Reviews)

12V 100Ah Lithium Battery

12100G24
Product video

This 12V 100AH Group 24 Lithium battery is our best-seller since 2018! This raved about battery keeps delivering reliable, long-lasting power with low-temp charging protection and Bluetooth monitoring—perfect for taking your fishing adventures to the next level.

UL Certified; ANSI/CAN/UL 1973:2022 Ed.3

Storage Capacity
The 100Ah storage capacity ensures dependable power delivery for demanding applications requiring long, uninterrupted operation.

Max Charge Voltage
14.6V

Cut-Off Voltage
10V

Size / Group Size
With a compact Group Size 24 form factor (10.23” x 6.61” x 8.35”),

Weight 26.55 lb

It is significantly lighter than a comparable lead-acid battery of the same capacity, making installation easier and reducing overall system weight.

Terminals
Built with heavy-duty M8 stainless steel terminals for powerful performance without excessive heat.

Operating & Electrical Parameters
The battery operates with a maximum charge voltage of 14.6V and incorporates a low-voltage cutoff at 10V via the BMS. It supports a maximum continuous charge and discharge current of 100A, with peak discharge currents up to 300A, and is engineered for reliable operation across a temperature range of -4°F to 140°F.

Alternator Charging
Compatible with alternator charging when the alternator’s maximum output voltage does not exceed 14.6V. Proper connections and verification of alternator output are required.

Built-In Bluetooth
Equipped with Bluetooth technology. The battery connects to an app that allows you to conveniently monitor multiple batteries at once—no more checking multiple apps. You can download the app here

Robust Design  for Longer Life
Robust yet lightweight, Millertech Sport Series Lithium Batteries can last up to 10X longer than AGM or lead-acid batteries. Never be stranded with a dead battery again!


Customer Reviews

James
Rating: 5/5
These batteries are top quality
These batteries are top quality. Wired them for 24v and discharge rate has been better than expected. Just ordered a starting battery to complete my system. Highly recommended Millertech.
Fri Aug 28 2026 02:59:46 GMT+0000 (Coordinated Universal Time)
TOM T
Rating: 5/5
Millertech 12V 100ah batteries
After seven years of AGM loyalty, they failed. Guys in the club told me to check out Millertech. I did a lot of research and called Millertech tech support. They answered all my questions. I pulled the trigger and had two new batteries the next day (live in the same state). Just spent eight hours on the Ohio river in heavy current and only used 35%. The weight savings, the performance, the peace of mind makes Millertech the only choice for your battery needs!!
Tue Jun 02 2026 22:26:43 GMT+0000 (Coordinated Universal Time)
Joe
Rating: 5/5
Millertech 12V 100ah batteries
The shipping was crazy fast. I ordered on Monday and received the batteries on wednesday, Installed them on thursday and am very satisfied with the product. Trolled today in the wind for 4 hours and the charge only dropped to 80%. I like this app that tells you about your battery life.
Tue May 05 2026 21:03:56 GMT+0000 (Coordinated Universal Time)
John
Rating: 5/5
MillerTech batteries
This is my second battery from MillerTech and the shipping is incredibly fast. The price and quality of these batteries are unbeatable.
Fri Mar 20 2026 21:16:09 GMT+0000 (Coordinated Universal Time)
David
Rating: 5/5
David
2nd order from MT. These are for son in laws new boat.
Sat Mar 07 2026 13:19:34 GMT+0000 (Coordinated Universal Time)
MARK
Rating: 4/5
Very Good Ordering Process
My ordering experience of purchase, notification of delivery was excellent. Hoping thing will arrive as promised as I have not received my batteries yet. I just wish Millertech had a multi-bank on board marine battery charger.
Sat Feb 28 2026 15:29:10 GMT+0000 (Coordinated Universal Time)
Michael
Rating: 5/5
Excellent product and service
Great service, I text the site a question about type of battery I should change to from a marine battery to lithium, recorded a response immediately. I placed my order on Thursday evening, got a confirmation and received product on Monday. Delivered without a problem!! Don’t get better than that.
Tue Dec 23 2025 15:33:06 GMT+0000 (Coordinated Universal Time)
Patrick Xiques
Rating: 5/5
5 Stars!
Excellent product, excellent customer service!
Wed Oct 22 2025 09:19:35 GMT+0000 (Coordinated Universal Time)
Carlos Gibson
Rating: 5/5
12V Group 24 100AH Sport Series Lithium
I am very pleased with them. I still had 88 percent remaining after a full day of river fishing. I did not charge them when I returned. I had 79 percent remaining after the second trip. It was after a full day on a trolling motor only lake. There is no fall off on power to my Ultrex at the end of the day. The app keeps you informed on the power remaining. The battery trays are built like a tank but weight nothing.
Tue Oct 21 2025 12:58:21 GMT+0000 (Coordinated Universal Time)
Billy Watson
Rating: 5/5
Great battery.
I run my trolling motor multiple days no problem. Love the bluetooth.
Wed Sep 03 2025 18:29:48 GMT+0000 (Coordinated Universal Time)

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