Odyssey Extreme G24 AGM Battery, 12V 840A CCA 76Ah
- Brand:
- Odyssey
- Part no:
- ODX-AGM24M
Image: Fisheries Supply
Where to buy
Specifications
- Chemistry
- AGM
- Voltage
- 12 V
- Dimensions (L x W x H)
- 10.9"L x 6.8"W x 8.8"H
- BCI group
- 24
- Capacity
- 76Ah
- Cold cranking amps
- 840 A
- Reserve capacity
- 160 min
- Warranty
- Up to 4-year limited full replacement warranty
The Odyssey Extreme G24 is a 12 volt, Group 24 sealed AGM battery rated at 840 cold cranking amps and 76Ah. It is described as handling both engine starting and repeated discharge, with a stated 400 cycles to 80% depth of discharge. A full recharge is claimed in 4 to 6 hours, and the operating range given runs from -40°F to 140°F. The warranty is up to 4 years of full replacement. The sealed, non-spillable case can sit in any orientation except upside down.
Our take
The 840A cold cranking rating paired with 400 cycles to 80% depth of discharge says this G24 is meant to start an engine and also take repeated deep draws. Its sealed case can lie on its side, but never inverted, so plan the mounting around that.
From our buying guide
A starting battery delivers a short burst of strong power, a deep-cycle battery a low, steady level for longer, and a dual-purpose battery a balance of the two. Buy for the job it will do.
Check before you buy:
- You've measured the tray against the maker's real dimensions, since a BCI group gives maximum sizes and some batteries sold as a drop-in run longer.
- You're comparing the same rating. Cold cranking amps are tested at 0°F and cranking amps at 32°F, so the second number is higher.
- If it's lithium, the maker says whether it may start an engine, and NMMA advises contacting your boat's manufacturer or a certified technician before replacing lead-acid.