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UB645WL Universal Power Group Sealed Lead Acid Battery 6V 4.5Ah, w/ Wire Lead

UB645WL Universal Power Group Sealed Lead Acid Battery 6V 4.5Ah, w/ Wire LeadQuantity in Basket: none
Code: UB645WL

Shipping Weight: 2.02 pounds
Length: 2.75"
Width: 1.86"
Height: 3.94"
General Specifications


2.76 inches

70 millimeters


1.86 inches

47 millimeters


4.02 inches

102 millimeters

Height over Terminals

4.25 inches

108 millimeters

Approximate Weight

2.02 pounds

0.90 kilograms


"WL" Leads terminating with free hanging AMP. INC. MATE-N-LOK connector. Socket housing 1-480318-0 mates with pin housing 1-480319-0.


ABS Plastic

Electrical Specifications
Nominal Voltage:

6 Volts (3 cell in series)

Nominal Capacity:

20 hour rate

(225mA to 5.25 volts)

4.5 AH

10 hour rate

(400mA to 5.25 volts)

4.0 AH

5 hour rate

(700mA to 5.10 volts)

3.5 AH

1 hour rate

(2700mA to 4.50 volts)

2.7 AH

Energy Density (20 hour rate)

1.29 Watt-hours/cubic inch

78.8 Watt-hours/l

Specific Energy (20 hour rate)

13.8 Watt-hours/pound

30.0 Watt-hours/kg

Internal Resistance (Fully Charged Battery)

20 milliohms (approx.)


Cycle Applications: Limit initial current to 900mA. Charge until battery voltage (under charge) reaches 7.20 to 7.35 volts at 68 F (20 C). Hold at 7.20 to 7.35 volts until current drops to approximately 45mA. Battery is fully charged under these conditions, and charger should either be disconnected or switched to "float" voltage.

"Float" or "Stand-by Service": Hold battery across constant voltage source of 6.75 to 6.90 volts continuously. When held at this voltage, the battery will seek its own current level and maintain itself in a fully charged condition.