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The DC-31 Deep-Cycle Heavy-Duty Battery is specially designed to
provide a greater number of deep-discharge cycles for the key off-loads the market demands today.
Special plate density characteristics enable longer periods of discharge for up to 28 percent more
cycles. The same rugged construction you have learned to expect from the ACDelco Maintenance-Free
Heavy-Duty line applies to the new CS-31. This battery is ideal for the "Split" application being
installed on today's class 8 rigs. It also is the perfect battery for liftgates, emergency
vehicles, buses, and RV applications.

Battery Description Chart
- Long cycle life for years of dependable Marine/RV and
"continuous use"
- Maintenance-Free — the electrolyte
reservoir is factory-filled and the tops are sealed
- Special wrought lead calcium grid reduces gassing and overcharge
- Rugged polypropylene case stands up to vibration and shock
- Marine terminals for convenient cable attachments (M24MF, M27MF,
M30HMF only)
- Carrying handle attached to the case with
corrosion-resistant polypropylene rope. (M24MF, M27MF, M30HMF only)
- Thermoplastic element anchors
- Built in Hydrometer tells you the battery condition at a glance: full charge, below 70
percent or below 50 percent
- Dual, tapered SAE-stud
terminal posts accept a variety of cable connections, including marine-type wing nuts (M24MF,
M27MF, M30HMF only)
- Run it down and recharge it over
and over again (M24MF, M27MF, M30HMF only), or operate on a vehicular charging system
- Hours of Usable Power (H.U.P.) for M24MF, M27MF,
M30HMF
- For maximum battery life where electrical
requirements are high, separate starting and running batteries are recommended
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