The Discover Battery EV31A-AM is a battery pack with a nominal voltage of 12 V and a weight of 32.00 kg (70.55 lb).
Last updated: 2 October 2026
Battery and charging
- Voltage
- 12 V
- Capacity at the 5-hour rate
- 98.0 Ah at 5 HR, 1.75 VPC, 25°C
- Capacity at the 20-hour rate
- 120.0 Ah at 20 HR, 1.80 VPC, 25°C
- Internal resistance
- 3.76 mΩ (the page's Note 4 says approximate)
“Voltage (V) 12”
Source: discoverbattery.com/products/search/ev31a-am
“Amp Hours (AH) 3 HR 5 HR 20 HR 92.0 98.0 120.0”
Source: discoverbattery.com/products/search/ev31a-am
“Amp Hours (AH) 3 HR 5 HR 20 HR 92.0 98.0 120.0”
Source: discoverbattery.com/products/search/ev31a-am
“Internal Resistance (mΩ) 3.76”
Source: discoverbattery.com/products/search/ev31a-am
Battery care and safety
- How fast it loses charge standing
- 2-3% per month at 20°C / 68°F
- Storage temperature
- -20°C to 60°C (-4°F to 140°F)
- Charge temperature range
- -10°C to 50°C (-14°F to 122°F)
- Discharge temperature range
- -40°C to 50°C (-40°F to 122°F)
“Self-Discharge (20°C / 68°F) 2-3% per month”
Source: discoverbattery.com/products/search/ev31a-am
“Storage Temperature -20°C to 60°C (-4°F to 140°F)”
Source: discoverbattery.com/products/search/ev31a-am
“Charge Temperature -10°C to 50°C (-14°F to 122°F)”
Source: discoverbattery.com/products/search/ev31a-am
“Discharge Temperature -40°C to 50°C (-40°F to 122°F)”
Source: discoverbattery.com/products/search/ev31a-am
Size and fit
- Weight
- 32.00 kg (70.55 lb)
- Length
- 330 mm (13.0 in)
- Width
- 172 mm (6.8 in)
- Height
- 216 mm (8.5 in)
- Terminal type
- AM
“Weight (lbs/kgs) 70.55 32.00”
Source: discoverbattery.com/products/search/ev31a-am
“Length A (in/mm) 13.0 330”
Source: discoverbattery.com/products/search/ev31a-am
“Width B (in/mm) 6.8 172”
Source: discoverbattery.com/products/search/ev31a-am
“Height C (in/mm) 8.5 216”
Source: discoverbattery.com/products/search/ev31a-am
“Terminal * AM”
Source: discoverbattery.com/products/search/ev31a-am
Other findings
- Bci group size
- BCI group 31
- Capacity at three hour rate
- 92.0 Ah at 3 HR, 1.70 VPC, 25°C
- Capacity rate conditions
- 3 HR: 1.70VPC; 5 HR: 1.75VPC; 20 HR: 1.80VPC, all at 25°C / 77°F
- Short circuit current
- 3100 A at 20°C / 68°F (approximate per Note 4)
- Technology
- DRY CELL AGM, VRLA
- Total height mm
- 236 mm (9.3 in)
“Industry Reference BCI: 31”
Source: discoverbattery.com/products/search/ev31a-am
“EV31A-AM BCI 31 Terminal AM”
Source: discoverbattery.com/products/sla-vrla-batteries/dry-cell-plus
“Amp Hours (AH) 3 HR 5 HR 20 HR 92.0 98.0 120.0”
Source: discoverbattery.com/products/search/ev31a-am
“3 HR: 1.70VPC; 5 HR: 1.75VPC; 20 HR: 1.80VPC. All at 25°C/77°F”
Source: discoverbattery.com/products/search/ev31a-am
“Short Circuit (A) (20°C / 68°F) 3100”
Source: discoverbattery.com/products/search/ev31a-am
“Technology DRY CELL AGM, VRLA”
Source: discoverbattery.com/products/search/ev31a-am
“Total Height D (in/mm) 9.3 236”
Source: discoverbattery.com/products/search/ev31a-am
Carts — none listed
No sourced compatibility evidence is on file for this battery yet.
Sources
- Discover EV31A-AM product pageMANUFACTURER BATTERY PAGE
Discover Battery
Source: discoverbattery.com/products/search/ev31a-am
Verified October 2, 2026