Our Support Team at 855-MAX-LITH (855-629-5484). We’re here Monday through Thursday 8:00 to 4:00 ET and Friday 8:00 to 3:00 ET. Our Support Team answers in about 10 seconds. At 11:30 we all break for lunch together, because a team that’s taken care of takes better care of you.

Yes, you’ll receive tracking information for your order. If you order on our website, tracking details are automatically emailed to you. If you place your order by phone, please request tracking information, and we’ll send it to you.

Yes, once you look at cost over the life of the battery and not just the price tag. How many cycles a Millertech LiFePO4 battery gives you depends on how deeply you drain it each time: up to 10,000 cycles at 30% depth of discharge (DoD), 7,000 at 50% and 5,000 at 80%. An AGM battery gets 600 to 800. Add a 10-year Sport Series warranty, and lithium costs less per trip than replacing lead-acid batteries every few seasons.

Yes! Millertech offers reliable lithium batteries for boats, trolling motors, RVs, and more. Our team can help you find the right replacement, backed by our 10-year, no-questions-asked warranty.

Rather than trade claims, compare what you can check – Millertech offers the following:
• Warranty: 10 years, shipping paid both ways, no proof of purchase needed.
• Support: a real person in Ohio answers in about 10 seconds.
• Remote help: Millertech can troubleshoot a Sport Series battery through the app.
• App: monitors up to six batteries in one place.

Millertech LiFePO4 is rated for more than 3,000 cycles and a calendar life of at least 10 years. The Sport Series warranty covers the same 10 years.

More than 2,000 times. Recharge it every few months for your trail camera and it’ll be around for a lot of hunting seasons. It has a Millertech 5 year No Hassle warranty!

About 10 years, and more than 3,000 charge cycles. A lead-acid battery usually lasts one to two years. That’s why every Sport Series battery carries a 10-year warranty.

About 10 years. Cycle life depends on how deeply you drain the battery each time: up to 10,000 cycles at 30% depth of discharge, 7,000 at 50% and 5,000 at 80%. A lead-acid battery usually lasts one to two years. That's why every Sport Series battery carries a 10-year warranty.

Yes, once you look at cost per cycle and not just the price tag. A Millertech LiFePO4 battery is rated for more than 3,000 cycles, compared with 600–800 for an AGM. It can also last up to 10 times longer than sealed lead-acid. Add the 10-year Sport Series warranty and it costs less over the life of your boat.

A lightweight, rechargeable lithium battery built to handle 2,000+ recharges. It comes with a Millertech 5 year No Hassle warranty!

It’s what’s inside, and what stands behind it. Millertech uses Grade A cells built to its own specifications. Its commercial-grade BMS is oversized by at least 20A. As Millertech puts it, “This, of course, costs us more.” A Sport Series battery also includes Bluetooth, the app, a marine-sealed case and the 10-year warranty. Amazon may offer cheap lithium, but that’s what you get. Cheaply made, and the suppliers are here today and gone tomorrow.