UNH12-77W

Rechargeable Products Sealed Lead Acid Battery www.oremabattery.com

General Features

Positive and negative plates in lead-calcium tin alloy.
A recognized component of UL.

Superior energy density
Very high power output.

Operates at a low internal pressure.
Application specific designs.

Gas Recombination.
Six months shelf life at 20℃.

Usable in any orientation.
Design life 5 years.

Dimensions

Length Width Height Total Height Approx. Weight

SI Units 181mm 77mm 167mm 167mm 5.4Kg

English Units 7.13inch 3.03inch 6.57inch 6.57inch 11.9lbs

Performance Characteristics

：
181 77

Nominal Voltage 12V

Number of cell 6：

° ℃：
Nominal Capacity 68 F(25 ) 15 min Wattage @1.67V 77W/cell

° ℃： ，
Nominal Capacity 77 F(25 ) 20 hour rate (0.9A 10.8V) 18Ah
76
1

： ° ℃ Ω
Internal Resistance Fully Charged battery 68 F(20 ) 9.5m

： ℃
Self-Discharge 3% of capacity declined per month at 20

：
Operating Temperature Range 0～60℃
Discharge -2 ～60℃ Storage -20～60℃
Charge -10

° ℃：
Max. Discharge Current 68 F(20 ) 270A (5S)
?12

：
Short Circuit Current 700A
4

： ° ℃
M5

Charge Methods Constant Voltage Charge 68 F(20 ) Unit:mm

： ～ 14.9V Maximum charging current 4.5A

Terminal(F13)
Hardware Torque 55in-Ibs(6.2NM)
Cycle use 14.5
： ～13.8V
Annual Retorque@75%

Standby use 13.6

 UNH12-77W
Rechargeable Products Sealed Lead Acid Battery

Discharge Date
Constant Current Discharge Date(Amperes at 25℃)
End Voltage
10min 15min 20min 25min 30min 35min 40min 45min 50min 55min 1h 1.5h 2h 2.5h 3h 4h 5h 6h 7h 8h 9h 10h 20h
Per cell/V

1.60 61.6 47.5 37.5 31.6 27.0 23.8 20.8 19.7 17.6 16.4 15.2 10.7 8.30 6.88 5.87 4.60 3.72 3.05 2.60 2.33 2.11 1.95 1.08
1.65 58.4 45.3 35.6 29.8 25.9 22.7 20.0 18.9 16.9 15.7 14.6 10.2 7.95 6..60 5.65 4.40 3.60 2.95 2.53 2.27 2.06 1.90 1.05
1.70 55.0 42.5 33.6 28.0 24.5 21.5 19.0 18.0 16.1 15.0 14.0 9.70 7.55 6..30 5.40 4.20 3.45 2.85 2.45 2.20 2.00 1.85 1.00
1.75 51.6 39.7 31.6 26.2 23.1 20.3 18.0 17.1 15.3 14.3 13.4 9.20 7.15 6.00 5.15 4.00 3.30 2.75 2.37 2.13 1.94 1.80 0.95
1.80 48.0 37.0 29.5 24.5 21.5 19.0 17.0 16.1 14.5 13.5 12.8 8.60 6.70 5.70 4.90 3.80 3.15 2.63 2.28 2.05 1.88 1.70 0.90

Constant Power Discharge Date(Watts per cell at 25℃)

End Voltage
10min 15min 20min 25min 30min 35min 40min 45min 50min 55min 1h 1.5h 2h 2.5h 3h 4h 5h 6h 7h 8h 9h 10h 12h
Per cell/V

1.60 105 81.5 64.0 54.0 48.4 43.2 38.5 35.2 32.0 30.0 27.7 19.4 15.2 13.0 11.1 8.35 6.90 5.80 4.80 4.25 3.83 3.40 2.92

1.65 101.5 78.5 61.5 51.6 46.2 41.5 37.0 33.7 30.8 29.0 26.9 18.6 14.6 12.6 10.7 8.05 6.75 5.70 4.71 4.18 3.76 3.34 2.88

1.67 100 77.0 60.5 50.2 45.0 40.2 36.4 33.0 30.2 28.7 26.5 18.3 14.3 12.4 10.5 7.90 6.60 5.62 4.67 4.14 3.73 3.32 2.86
1.70 98.0 75.5 59.0 59.2 44.0 39.5 35.2 32.1 29.5 27.9 26.0 17.8 13.9 12.0 10.2 7.70 6.45 5.50 4.60 4.09 3.68 3.28 2.84
1.75 94.0 72.5 56.5 56.7 41.8 37.5 33.4 30.5 28.2 26.8 25.1 17.0 13.2 11.4 9.70 7.40 6.15 5.30 4.50 4.00 3.60 3.22 2.80

1.80 89.5 69.0 53.5 54.0 39.4 35.5 31.5 28.8 26.8 25.6 24.1 16.1 12.5 10.8 9.20 7.00 5.80 5.05 4.35 3.88 3.50 3.15 2.75

charge characteristic curve Cycle service life in relation to depth of discharge Temperature effects on float life
t e
de em n
e g
a
Constant voltage charging characteristic 120 10
gr ul r t
ah oV
r
u l
o (0.25CA,25℃ )
C C V
(% ) ( rC A ) (V)
100

1 20 )% 80
0 .2 5
15 . 0
C ha rg ed
vo lu me (y )s
10 0
0 .2 0 ti
60
ra 1
2.30V/cell

80
14 . 0 ca 100%D.O.D 50%D.O.D 30% Depth of discharge ey
C ha r ge vo l ta g e
pa
60
0 .1 5
13 . 0 C 40 (e
0 .1 0 fi
40 12 . 0
20 L
0 .0 5
20
11 . 0
Ch a rg i ng cu r re n t
0 0 0.1
0 2 4 6 8 10 12 14 16 18 20 0 200 400 600 800 1000 1200 1400 10 20 30 40 50 60
Charging time（ hours) Number of cycles(cycles) Temperature(℃ )