Whisper Power AGM Battery - 12V / 55AhThe WhisperPower AGM Battery 12 V – 55 Ah is the most economical, maintenance-free battery designed for long life. WhisperPower 12 V – 260 Ah AGM batteries are based on VRLA technology (Valve Regulated Lead Acid), meaning they require little ventilation, do not have to be positioned upright and do not require any maintenance. - 55 Ah, 12 VDC
- Suitable for medium sized inverters
- Power supply for entire DC installation
- Powering pumps and winches
- Suitable for marine, mobile and solar energy systems- and as a starter battery.
TECHNICAL SPECIFICATIONS
Length x width x height - 229 × 138 × 210 mm (9" x 5.4" x 8.3" inch)
Weight ± 10% - 18.0 kg / 39.7 lb.
Nominal capacity - 55 Ah
C10* or C20 - C10
Nominal voltage - 12,0 VDC
Terminal type - M6 rvs
Number of cells - 6
Constant charge voltage (IU, float) - 13.60 .. 13.80 VDC at 25oC
Cyclic charge voltage (IUU, absorption) - 14.25 .. 14.60 VDC at 25oC
Maximum recommended charge current (higher possible) - 40 to 50% of nominal capacity
Temperature ratio - -4mv/cel/°C
Discharge voltage - 1.75 VDC @ (A) ≤ 0.2°C • 1.70 VDC @ 0.2°C (A) ≤ 1.0°C
Full discharge (100% DOD) - 1.65 VDC @ (A) ≥ 1.0°C
Nominal 25°C - UP TO 1.75 VDC/CEL
20 hours discharge - 58.6Ah
10 hours discharge - 55.0 Ah
5 hours discharge - 44.5 Ah
Peukeurt Coefficient - 1.21<P<1.24
Usage at 25 A discharge - 92 min
Self discharge - Less than 3% per month at 25°C
Storage time - AGM batteries can be stored for up to 6 months at 25°C, recommended to charge before use
Inrush current at 25°C (5s) - 550 A
Cyclic life at 80% discharge - 400
Internal resistance (approx.) - 6,0m Ω | 
