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Yuasa Technical Data Sheet
Yuasa NP4-12 Industrial VRLA Battery
Layout
Specifications
Nominal voltage (V) 12
20-hr rate Capacity to 10.5V at 20°C (Ah) 4
10-hr rate Capacity to 10.8V at 20°C (Ah) 3.7
Dimensions
Length (mm) 90 (±1)
Width (mm) 70 (±1)
Height over terminals (mm) 106 (±2)
Mass (kg) 1.75
Terminal Type
FASTON - Quickfit / release (JST where stated) 4.75
Operating Temperature Range
Storage (in fully charged condition) -20°C to +60°C
Charge -15°C to +50°C
Discharge -20°C to +60°C
Storage
Capacity loss per month at 20°C (% approx.) 3
Case Material
Standard ABS (UL94:HB)
FR version available UL94:V0
Charge Voltage
Float charge voltage at 20°C (V)/Block 13.65 (±1%)
Float charge voltage at 20°C (V)/Cell 2.275 (±1%)
Float Chg voltage tmp correction factor from std
20°C (mV)
-3
Cyclic (or Boost) charge Voltage at 20°C (V)/Block 14.5 (±3%)
Cyclic (or Boost) charge Voltage at 20°C (V)/Cell 2.42 (±3%)
Cyclic Chg voltage tmp correction factor from std
20°C (mV)
-4
Charge Current
Float charge current limit (A) No limit
Cyclic (or Boost) charge current limit (A) 1
Maximum Discharge Current
1 second (A) 120
1 minute (A) 40
Impedance
Measured at 1 kHz (mΩ) 40
Design Life & Approvals
EUROBAT Classification: Standard Commercial 3 to 5
Yuasa design life at 20°C (yrs) up to 5
3rd Party Certifications
ISO9001 - Quality Management Systems
UNDERWRITERS LABORATORIES Inc.
Safety
Installation
Can be installed and operated in any orientation except
permanently inverted.
Handles
Batteries must not be suspended by their handles (where
fitted).
Vent valves
Each cell is fitted with a low pressure release valve to allow
gasses to escape and then reseal.
Gas release
VRLA batteries release hydrogen gas which can form
explosive mixtures in the air. Do not place inside a sealed
container.
Recycling
YUASA’s VRLA batteries must be recycled at the end of life in
accordance with local and national laws and regulations.
Data Sheet generated on 02/01/2020 – E&OE
The world's leading battery manufacturer