OPTIMA RedTop 25 AGM Starting Battery
- 720 CCA, 12-volt
- 44 AH C20 capacity
- 90 minutes reserve capacity
- 9.38 x 6.75 x 7.69 in, 31.7 pounds
- SAE posts, sealed AGM
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact sealed AGM starter with solidly rated cranking for cars and light trucks. It is built for starting and basic electrical loads, not heavy accessory draw.
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ASIN: B000MSBU9UModel: RedTop 25Category: Vehicle Batteries
Overview
Under the hood of a compact car or light truck, this OPTIMA RedTop replaces a flooded battery with a sealed SpiralCell AGM unit. It cranks hard in bad weather and mounts in many positions.
A smaller footprint than the larger RedTops fits tighter trays while keeping AGM toughness. Faster recharging suits short commutes. Warranty is only listed as see manufacturer.
Who it's for
Daily drivers with this battery size suit the sealed design. Vehicles with heavy electrical loads need a deep cycle battery.
Pros and cons
- Sealed and spill proof
- High vibration resistance
- Mounts in many positions
- Lower capacity than larger sizes
- Warranty not specified
Performance notes
Spiral cells deliver high current for starting, and AGM mats hold the electrolyte in place. Reserve capacity limits engine-off accessory time. Charging recovers faster than flooded batteries.
Specifications
| Brand | OPTIMA |
|---|---|
| Model | RedTop 25 |
| Dimensions & fit | |
| Size | 9.38 x 6.75 x 7.69 in |
| Item weight | 31.7 pounds |
| Capacity & performance | |
| Capacity | 44 AH (C20) |
| Reserve capacity | 90 minutes |
| Power & efficiency | |
| Voltage | 12 volts |
| Battery Type | Sealed AGM lead acid |
| Compatibility & installation | |
| Compatible with Vehicle Type | Passenger Car, Truck |
| Warranty & support | |
| Manufacturer Warranty Description | See manufacturer |
| Other details | |
| Terminal | SAE Terminal |
| Cold cranking amps | 720 CCA |
Frequently asked questions
Is the OPTIMA 25 RedTop a deep cycle battery?
No. It is a starting battery described as suited to basic electrical demands.
How many cold cranking amps does the OPTIMA 25 have?
720 CCA.
What size is it?
9.38 x 6.75 x 7.69 in, 31.7 pounds.
Is it spill proof?
Yes. It is completely non-spillable.