NICKEL METAL HYDRIDE HANDBOOK
AUGUST 2005
NICKEL METAL HYDRIDE BATTERIES: INDIVIDUAL DATA SHEET
This information is generally descriptive only and is not intended to make or imply any representation, guarantee or warranty with respect to any cells and batteries. Cell and battery designs/specifications are subject to
modification without notice. Contact Panasonic for the latest information.
Typical Discharge Characteristics
Typical Charge Characteristics
HHR300CH
Cylindrical C size (HR 26/50) for backup use
Dimensions (with Tube) (mm)
Specifications
1
After charging at 0.1It for 16 hours, discharging at 0.2It.
2
For reference only.
3
Need specially designed control system
Control System:
dT/dt cut-off; 1 to 2°C/min
-
U
V cut-off; -
U
V per cell = 5 to 10 mV
T-control; T=65°C
Rapid charger timer; 2.4h (at 1.25a)
Trickle timer; within 2h
4
With control system
Battery performance and cycle life are strongly affected by how they are used. In
order to maximize battery safety, please consult Panasonic when determining
charge / discharge specs, warning label contents and unit design.
(
+
)
( )
50.0
+
-
0
1.5
25.8
+
-
0
1.0
0
2
4
6
8
10
20
30
40
50
60
2.0
1.8
1.6
1.4
1.2
1.0
0.8
Voltage (V)
Charge Time (hours)
Charge: 300mA(0.1 It) x 16hrs.
10˚C
25˚C
60˚C
-20
-10
0
10
20
30
40
50
60
70
Capacity Ratio (%)
Temperature (
°
C)
120
110
100
90
80
70
60
50
40
30
Charge: 300mA (0.1 It) x 16 hrs.
Charge Temperature: -10 to 60˚C
Discharge: 600mA (0.2 It)
Cut-off Voltage: 1.0V
Discharge Temperature: 25˚C
0
5
10
15
20
25
30
Voltage (V)
Discharge Time (minutes)
Charge: 300mA(0.1It) x 16 hrs., 25
°
C
Discharge: 10A, 20A, 25
°
C
10A
20A
1.8
1.6
1.4
1.2
1.0
0.8
Note:
[It] was previously expressed as [C]. [It] is an IEC standard expression
for the amount of charge or discharge current and is expressed as:
It(A) = Cn (Ah)/1h.
• [It] is the reference test current in ampres
• [Cn] is the rated capacity of the cell or battery in Ampere-hours.
n = the time base [hours] for which the rated capacity is declared
Nominal Voltage
1.2V
Discharge
Capacity
1
Average
2
Rated (Min.)
3300 mAh
3100 mAh
5m
Ω
300mA (0.1It) x 16hrs.
1500mA (1It) x 2.4 hrs.
4
155mA x 32 hrs.
100mA x 48 hrs.
Approx. Internal impedance
at 1000Hz at charged state.
Charge
Charge
Discharge
Storage
Standard
Rapid
3
Low Rate
Standard
Rapid
Low Rate
Ambient
T
emperature
˚
C
˚
F
0˚C to 45˚C
10˚C to 40˚C
-10˚C to 45˚C
-10˚C to 65˚C
-20˚C to 35˚C
-20˚C to 35˚C
-20˚C to 55˚C
32˚F to 113˚F
32˚F to 104˚F
14˚F to 149˚F
14˚F to 113˚F
-4˚F to 95˚F
-4˚F to 95˚F
-4˚F to 131˚F
< 1 year
< 3 months
< 1 month
Diameter
Height
Approximate
Weight
mm
Grams
Ounces
25.8+0/-1.0
50.0+0/-1.5
inch
1.02+0/-0.04
1.97+0/-0.06
80
2.82
