Odyssey Extreme 34R‑PC1500T (Group 34R) Battery

A heavy-duty Thin Plate Pure Lead (TPPL) AGM battery for trucks and SUVs that need strong cold starts and dependable accessory power. Best for vehicles with winches, lighting, plows, inverters, or upgraded audio where vibration resistance and low-maintenance performance matter.

Key Specs

BCI Group	34R (reversed terminals)
Voltage	12V
Capacity (C20)	68Ah
Cold Cranking Amps (CCA)	880
Pulse Hot Cranking Amps (PHCA)	1350A (5 seconds)
Battery Type	AGM, TPPL (maintenance‑free, non‑spillable)
Dimensions (L×W×H)	10.85 × 6.76 × 7.82 in
Weight	~49.5 lb
Cycle life	Up to 400 cycles at 80% depth of discharge
Operating temp	-40°F to 113°F
Terminals	SAE automotive posts (tin‑plated)

Who Should Choose This

• Truck/SUV owners in cold climates needing strong cranking for large engines.
• Vehicles with added electrical loads: winches, off‑road lights, plows, air compressors, fridges, or audio systems.
• Off‑road and overlanding builds that demand vibration resistance and sealed construction.

When to Pick a Different Option

• If you need the same size but standard terminal orientation: look for Group 34 (not 34R).
• If you regularly discharge below 50% for long periods: consider a dedicated deep‑cycle/house battery or a dual‑battery setup.
• If weight is critical: a lithium iron phosphate (LiFePO4) system can be lighter, but requires compatible charging, cold‑weather management, and often a separate house battery.

Fitment & Compatibility

• Group 34R: Same footprint as Group 34, but the positive/negative posts are reversed. Verify cable reach and polarity before ordering.
• Mounting: Sealed AGM allows flexible mounting orientations (not upside down). Use the correct hold‑down to prevent movement.
• Charging system: Works with standard 12V automotive alternators. Best results when the vehicle charges at ~14.4–14.7V during absorption and ~13.5–13.8V at float.

Performance Expectations

This model combines high‑rate cranking with moderate deep‑cycle capability. Use the estimates below to plan accessory runtime; actual results vary with temperature, wiring, and state of charge.

• Usable capacity for longevity: ~50% of 68Ah ≈ 34Ah.
• Example runtimes (approx.):
  • 12V fridge at 3A: 9–12 hours before 50% depth of discharge.
  • Camp lighting at 1A: 28–34 hours before 50% depth of discharge.
  • Winching: very high current draw; plan short bursts and recharge immediately.

Charging & Maintenance

• Charger type: Use an AGM‑compatible smart charger. Typical settings: absorption 14.4–14.7V, float 13.5–13.8V. Follow the charger and battery manuals.
• Charge rate: 10–25A is a safe, effective range for garage charging of a 68Ah AGM.
• Storage: Store fully charged in a cool, dry place. Top off every 1–3 months. Self‑discharge is low (AGM ~2–3%/month at ~70°F).
• Connections: Clean and tighten terminals. Use dielectric grease on clamps to limit corrosion.
• Recovery: If deeply discharged, use a charger with an AGM reconditioning mode; recharge as soon as possible to preserve life.

Pros and Cons

• Pros: Strong cold starts (880 CCA), robust vibration resistance, sealed/maintenance‑free, handles accessory loads better than standard flooded batteries.
• Cons: Heavier than many alternatives; not ideal for repeated deep discharges; requires AGM‑appropriate charging voltages.

Safety Notes

• Wear eye protection and remove metal jewelry when working around batteries.
• Avoid short circuits; confirm polarity before connecting.
• Do not overcharge (sustained voltage above recommended levels can cause damage).
• If installed inside a cabin or enclosed area, ensure appropriate ventilation during charging.

Alternatives

• Group 34 (non‑R): Same size with standard terminal orientation.
• Dual‑battery systems: Add a dedicated deep‑cycle house battery with an isolator if you power accessories for long periods with the engine off.
• LiFePO4 (house loads): Consider for weight savings and deeper cycling, but keep an AGM starter or ensure your system is LiFePO4‑compatible in cold weather.

FAQ

Is the 34R‑PC1500T a starting or deep‑cycle battery?

It’s a high‑performance AGM starting battery with moderate deep‑cycle capability. It can power accessories, but frequent deep discharges will shorten life—use a dual‑battery setup for heavy camping or winching.

Will it fit my vehicle?

It fits trays that accept BCI Group 34R size and SAE posts. Check your owner’s manual or existing battery label to confirm Group 34 vs 34R and ensure cable reach for the reversed terminals.

Do I need a special charger?

Use an AGM‑compatible smart charger. Typical absorption is 14.4–14.7V and float 13.5–13.8V. Many modern maintainers support these settings.

Can I mount it on its side?

Yes. As a sealed AGM it can be mounted in various orientations (not upside down). Always secure the battery with the correct hold‑down.

How does it handle cold weather?

With 880 CCA and TPPL construction, it cranks well in the cold. Keep it fully charged in winter for best performance.