24V 200Ah LiFePO4
Twice the tank. 5,120Wh is double the Group 31 unit — multi-day trips, all-day spot-lock in heavy current, or a shared house-and-trolling bank — with a 200A BMS that never breaks a sweat. Note the Group 8D case: at 20.5" × 10.6" and 86 lbs, measure your compartment before ordering; it will not fit a Group 31 tray.
Buy at LiTime.com →LiTime 24V 200Ah Group 8D · Partner product — the purchase completes on LiTime's site, and LiTime ships and supports the battery directly with a 5-year warranty.
Same matching 29.2V LiFePO4 charger as the Group 31 — at 40A it refills this 200Ah battery in about 5 hours.
Get the matching charger at LiTime.com →Disclosure: we may earn a commission on purchases made through these links, at no extra cost to you.
Specifications
| Capacity | 200Ah / 5,120Wh |
| Weight | 85.8 lbs (vs ~240 lbs of lead-acid for the same usable energy) |
| Size | 20.47" × 10.59" × 8.66" — Group 8D (measure your compartment) |
| Continuous discharge | 200A BMS (400A for 5 seconds) |
| Cycle life | 4,000–15,000 cycles depending on depth of discharge (per LiTime) |
| Parallel support | Up to 4 identical units in parallel (per LiTime) |
| Waterproof rating | IP65 |
| Terminals | M8 bolt |
| Warranty | 5 years |
Why LiFePO4 beats lead-acid
- It outlasts 8–10 lead-acid batteries. A deep-cycle lead-acid gives you 300–500 cycles; this battery is rated for 4,000+. Over a decade of fishing, lead-acid costs more in replacements alone — before you count the Saturdays lost to a dead bank.
- All of its capacity is usable. Draining lead-acid past ~50% wrecks it, so a "100Ah" lead-acid is really a 50Ah battery. LiFePO4 delivers essentially its full rating.
- Full thrust to the last cast. Lead-acid voltage sags as it drains — your motor gets weaker all day. LiFePO4 holds voltage nearly flat, so the motor pulls the same at 4pm as it did at first light.
- A fraction of the weight in the bow — where weight matters most for how the boat rides. See the spec table above for the exact numbers versus the lead-acid bank this replaces.
Why we recommend LiTime
- Purpose-built trolling line — these are LiTime's TM/marine models: IP65-sealed, shock-rated, with low-temperature protection built into the BMS. Not a repackaged RV battery.
- Dedicated-voltage design — one battery instead of a series bank means no wiring to get wrong and no mismatched batteries aging each other.
- 5-year warranty, US support — LiTime is one of the largest-volume LiFePO4 brands, ships from US warehouses, and stands behind the battery directly.
- Roughly half the price of boutique brands for the same chemistry and a comparable warranty. We'd rather you spend the difference on fuel.
Mounting the motor too?
Our reversible aluminum bow plate fits virtually every center console — and both 4-bolt and 6-bolt puck patterns.
View the trolling motor mount — $275