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Deka MK 8A8D AGM Deep Cycle VRLA Battery
Deka MK 8A8D Battery - 12V 245Ah AGM 8D Deep Cycle VRLA
Warranty
The Big AGM Workhorse
- Sealed VRLA with self-sealing vents - maintenance free, non-spillable, no watering schedule and no acid handling.
- Lead-calcium plates, forged terminals and bushings - the same hard-service construction set as the rest of the Deka 8-series.
- S (SAE) posts - the automotive-style terminal the 8D class standardized on.
- East Penn manufacture - built in the USA and distributed through MK Battery.
Technical Specifications
| Deka MK 8A8D Specifications | |
|---|---|
| Part Number | 8A8D (also searched as 8A 8D, Deka 8A8D, MK 8A8D) |
| Battery Type | AGM VRLA, deep cycle, BCI group 8D |
| Nominal Voltage | 12V |
| Capacity at C/100 | 250 Ah |
| Capacity at C/20 | 245 Ah |
| Capacity at C/5 | 197 Ah |
| Plate Alloy | Lead calcium |
| Posts | Forged terminals and bushings, S (SAE) terminal |
| Container | Polypropylene |
| Vent | Self-sealing |
| Cycle Charge Voltage | 13.8 to 14.6 volts at 77°F |
| Float Charge Voltage | 13.4 to 13.6 volts at 77°F |
| Operating Temperature | -40°F to +140°F (-40°C to +60°C) |
| Length, including handles | 20.87 inches (530 mm) |
| Width | 10.97 inches (279 mm) |
| Height, including terminal | 9.62 inches (244 mm) |
| Weight | 163 lbs (74 kg) |
| Warranty | 12 months (MK Battery) |
Where This Battery Is Used
- Renewable energy banks - series strings for 24V and 48V storage behind solar and wind charge controllers.
- Marine and coach power - the 8D slot in vessels and RVs, sealed for below-deck and bay mounting.
- Telecom and standby DC - big-block reserve where a flooded 8D used to sit.
Ordering and Freight
Frequently Asked Questions
Will the 8A8D fit my existing 8D tray?
The case is standard BCI group 8D, and the published 20.87-inch length includes the molded lifting handles, so the case body itself sits shorter. Measure the tray against 20.87 by 10.97 inches with 9.62 inches of clearance to the terminal tops and the fit question is settled before the freight moves. At 163 lbs, plan the lift: the handles are there because two people need them.
Can I replace a flooded 8D with this battery?
Usually, and it is one of the most common orders we quote. The footprint matches, the watering schedule disappears, and the sealed case drops the venting and acid-handling requirements of a wet battery. The one thing to verify is the charging source: the 8A8D wants 13.8 to 14.6 volts in cycle service and 13.4 to 13.6 on float at 77°F, and a charger profiled for a flooded battery may sit above that. Send your charger model with the quote request and the specialist confirms compatibility.
Can I run 8A8Ds in series for a 24V or 48V bank?
Yes, that is the standard architecture: two in series for 24V, four for 48V, with parallel strings added for capacity. Buy the string as one batch so every unit starts at the same age and state of charge, keep interconnect cables equal length where the layout allows, and torque every S post connection to spec at commissioning. A specialist can price the full bank and the interconnects in one written quote.
Send the quantity, your delivery ZIP and your requested-by date. A specialist confirms availability, the warranty term, volume pricing and freight in writing, with no obligation to buy.
Call 1-877-775-4381 · battery specialists, not a call centerWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov (State of California only).
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