# Odyssey 34-PC1500T Extreme Series vs Optima RedTop 34/78 (8004-003): specs and price compared

A sourced, side-by-side comparison of the Odyssey 34-PC1500T Extreme Series (Odyssey (EnerSys)) and Optima RedTop 34/78 (8004-003) (Optima Batteries) among car batteries. Optima RedTop 34/78 (8004-003) is the cheaper of the two at $279.99.

## Side by side

| Spec | Odyssey 34-PC1500T Extreme Series | Optima RedTop 34/78 (8004-003) |
| --- | --- | --- |
| US price | $429.99 | $279.99 |
| Brand | Odyssey (EnerSys) | Optima Batteries |
| Battery type | AGM | spiral-wound-AGM |
| Bci group size | 34 | 34/78 |
| Cold cranking amps | 850 | 800 |
| Cranking amps ca | 1050 | — |
| Reserve capacity min | 135 | 100 |
| Capacity ah | 68 | 50 |
| Terminal type | top-post | dual |
| Weight (lb) | 49.5 | 38.8 |
| Warranty months | — | 36 |
| Maintenance free | Yes | Yes |
| Dimensions inches | 10.9 x 6.8 x 7.9 | 10.06 x 6.94 x 7.88 |

## Key differences

- Battery type: Odyssey 34-PC1500T Extreme Series AGM vs Optima RedTop 34/78 (8004-003) spiral-wound-AGM
- Bci group size: Odyssey 34-PC1500T Extreme Series 34 vs Optima RedTop 34/78 (8004-003) 34/78
- Cold cranking amps: Odyssey 34-PC1500T Extreme Series 850 vs Optima RedTop 34/78 (8004-003) 800
- Reserve capacity min: Odyssey 34-PC1500T Extreme Series 135 vs Optima RedTop 34/78 (8004-003) 100
- Capacity ah: Odyssey 34-PC1500T Extreme Series 68 vs Optima RedTop 34/78 (8004-003) 50
- Terminal type: Odyssey 34-PC1500T Extreme Series top-post vs Optima RedTop 34/78 (8004-003) dual
- Weight (lb): Odyssey 34-PC1500T Extreme Series 49.5 vs Optima RedTop 34/78 (8004-003) 38.8
- Dimensions inches: Odyssey 34-PC1500T Extreme Series 10.9 x 6.8 x 7.9 vs Optima RedTop 34/78 (8004-003) 10.06 x 6.94 x 7.88

## What reviewers say

**Optima RedTop 34/78 (8004-003)** — Only one whitelisted tester covers this battery. Pro Tool Reviews names the Optima RedTop its best-value AGM pick, praising reliability, longevity and vibration resistance while flagging a lower CCA rating than pricier rivals. This is a qualitative buying-guide verdict for the RedTop line (which includes the 34/78), not a bench test of the 8004-003, and no whitelisted outlet published measured lab numbers for this exact model. (1 sourced review.)

## Sources

- Odyssey 34-PC1500T Extreme Series: https://www.odysseybattery.com/products/odx-agm34-battery-34-pc1500t/ (odysseybattery.com, verified 2026-07-13)
- Optima RedTop 34/78 (8004-003): https://www.optimabatteries.com/products/redtop-34-78 (optimabatteries.com, verified 2026-07-13)

Canonical: https://frontdeskreview.com/gear/car-batteries/odyssey-34-pc1500t-vs-optima-redtop-34-78/
Cite: Per The Front Desk Review, Odyssey 34-PC1500T Extreme Series ($429.99) vs Optima RedTop 34/78 (8004-003) ($279.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-batteries/odyssey-34-pc1500t-vs-optima-redtop-34-78/
License: CC BY 4.0.