Will the Redodo 12V100AH fit in a BCI Group 31 battery box?

We chose this product for a full review because the fit question depends on the listed dimensions, not the amp-hour rating alone. Measure your box’s inside length first, then check the lid clearance against the 8.43-inch height.

Redodo 12V100AH dimensions and BMS determine box fit

Redodo 12V100AH is a 12V LiFePO4 battery with a 100Ah capacity and a 13 x 6.77 x 8.43-inch case. A LiFePO4 battery buyer needs this check because the battery may fit the tray but still block the lid, terminals, or hold-down hardware. The listing also states M8 Terminal Studs, a 100A BMS, and support for series or parallel use. The BMS is the battery-management system that protects the pack during use.

You can view our full Redodo 12V100AH spec comparison to see how it stacks up against other models.

What to Check Before Buying the Redodo 12V100AH

• Measure the inside length of your BCI Group 31 battery box. The battery is 13 inches long.
• Check the inside height with the lid closed. The case is 8.43 inches tall.
• Confirm your hold-down hardware leaves room for M8 terminal studs. Those studs are the connection points for cables.
• Verify your fuse or breaker matches your own system design. The listing does not state a fuse rating.
• Check whether your charger is set for LiFePO4 charging. A lead-acid profile can leave a lithium pack improperly charged.
• Look at your first-charge plan if you expect a break-in period. The listing does not state a required balancing period.

Where the Redodo 12V100AH Fits Among 12V Battery Options

The Redodo 12V100AH sits in the common 100Ah, 12.8V drop-in class, so it suits buyers who want a standard 12V replacement in a compact case. If you need more runtime, a larger-capacity battery type may be a better fit than a single 100Ah unit. If your setup needs a higher continuous current than 100A, you should look at batteries built for heavier inverter or motor loads instead. The price is around $199.99, so size and current limits matter more than chasing a lower upfront cost.

If you live in a freezing climate, see the best lifepo4 battery for cold weather to ensure reliable performance.

When Redodo 12V100AH suits a tight battery box

Choose this battery if your box has the interior space for 13 x 6.77 x 8.43 inches and your load stays within a 100A continuous draw. It fits a practical replacement role for buyers who want a 12V, 100Ah LiFePO4 pack with M8 terminals and built-in protection. If your box is tight on height, or your system needs a stronger discharge margin, choose a different battery type before ordering.

Reviewed by the Predicament Measures editorial team.