Odyssey (EnerSys)
Odyssey 34-PC1500T Extreme Series
$429.99
Best Car Batteries · head-to-head
Odyssey 34-PC1500T Extreme Series vs Optima RedTop 34/78 (8004-003)
A sourced, side-by-side comparison. Optima RedTop 34/78 (8004-003) is cheaper at $279.99. Every spec and price links to its source.
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Optima Batteries
Optima RedTop 34/78 (8004-003)
$279.99Cheaper
Which is better: the Odyssey 34-PC1500T Extreme Series or Optima RedTop 34/78 (8004-003)?
The Optima RedTop 34/78 (8004-003) wins 1 of the 1 specs we compare head to head; the other wins 0. The Optima RedTop 34/78 (8004-003) is the cheaper at $279.99. The Optima RedTop 34/78 (8004-003) both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Odyssey 34-PC1500T Extreme Series | Optima RedTop 34/78 (8004-003) |
|---|---|---|
| US price | $429.99 | $279.99 |
| Brand | Odyssey (EnerSys) | Optima Batteries |
| Released | — | — |
| 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 |
Sources — Odyssey 34-PC1500T Extreme Series: odysseybattery.com (verified 2026-07-13). Optima RedTop 34/78 (8004-003): optimabatteries.com (verified 2026-07-13).
What's the difference between the Odyssey 34-PC1500T Extreme Series and Optima RedTop 34/78 (8004-003)?
Where the two actually differ on the specs we track (8 of 11). Matching specs are omitted.
- 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
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Odyssey 34-PC1500T Extreme Series
No sourced tester review yet.
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.)
Praised: Best-value AGM pick — reliable and worth the price premium; Spiral-cell design resists vibration and outlasts standard lead-acid; 3-year replacement warranty, widely available in-store and online.
Flagged: Lower CCA rating than competing AGM batteries; Heavy-electronics or auto stop-start vehicles need the pricier YellowTop; More expensive than standard lead-acid batteries.