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Specifications
Ampere-Hour Capacity Based On Discharge Rate
The EnergyCell battery capacity is measured in amp-hours. The battery capacity is not a fixed number, but will
vary with conditions. (See page 8.) The figures in the tables below are used to measure the capacity of the
EnergyCell battery based on load size.
Battery capacity is judged by the number of amp-hours measured when a battery is discharged to a standard
voltage under load. This is known in the industry as "terminal voltage". A commonly cited terminal voltage is
10.5 volts per 12-volt battery, or 1.75 volts per cell (Vpc). Another common value is 1.85 volts per cell; this value
is used when sizing batteries conservatively to avoid severely discharging them.
The amp-hours measured upon reaching terminal voltage also depend on the size of the load. A load capable of
discharging the battery in 1 hour is far larger than a load which takes 3, 4, or 5 hours. (8-hour loads, 12-hour
loads, etc. are progressively smaller in size.) As described on page 8, the battery has less capacity under larger
loads and more capacity under smaller loads.
Table 7 shows EnergyCell capacity at a terminal of voltage 1.75 Vpc. Table 8 shows EnergyCell capacity at a
terminal voltage of 1.85 Vpc.
Example: Under a 1-hour load, the EnergyCell 170RE has a capacity of only 89.1 amp-hours when measured to
1.75 Vpc in Table 7. Under a much lighter 100-hour load, the same battery has 170 amp-hours in Table 7, almost
twice that amount.
Other EnergyCell batteries are measured similarly.
Table 7
Model
1
2
3
34RE
19.7
23.6
26.1
52RE
29.6
35.1
38.9
78RE
43.5
53.2
58.5
95RE
47.0
58.0
66.0
106RE
49.2
61.5
70.0
170RE
89.1
-
114.2
200RE
103.0
-
132.0
200GH
120.0
-
148.5
220GH
133.5
-
166.2
Table 8
Model
1
2
3
34RE
22.3
25.8
28.1
52RE
33.5
38.4
41.9
78RE
49.3
58.2
63.1
95RE
53.3
63.5
71.1
106RE
55.7
67.3
75.5
170RE
100.9
-
123.1
200RE
116.7
-
142.3
200GH
136.0
-
160.1
220GH
151.3
-
179.2
20
Amp-Hour Capacity to 1.75 Vpc @ 77°F (25°C)
Discharge in Hours
4
5
6
7
28.0
29.0
29.6
30.1
41.4
43.3
44.6
45.4
62.0
64.5
66.6
68.6
70.8
74.0
76.2
78.0
76.0
80.6
84.0
86.8
120.6
125.9
-
-
139.6
145.5
-
-
154.8
159.0
-
-
173.2
178.0
-
-
Amp-Hour Capacity to 1.85 Vpc @ 77°F (25°C)
Discharge in Hours
4
5
6
7
29.9
30.8
31.4
31.8
44.3
46.0
47.3
47.9
66.3
68.6
70.7
72.4
75.7
78.7
80.8
82.4
81.2
85.7
89.1
91.7
128.9
133.8
-
-
149.2
154.7
-
-
165.5
169.0
-
-
185.2
189.2
-
-
8
10
12
20
30.1
31.1
31.7
33.0
46.0
47.2
48.0
50.0
69.6
71.0
72.0
75.0
79.2
81.7
83.6
88.0
89.0
92.0
94.2
100.0
137.0
-
145.3
153.8
158.4
-
168.0
178.0
168.8
-
176.4
191.0
188.8
-
198.0
214.0
8
10
12
20
31.8
32.7
33.4
34.7
48.7
49.7
50.5
52.6
73.6
74.7
75.8
78.8
83.8
85.9
88.0
92.5
94.2
96.8
99.2
105.1
144.9
-
153.0
161.6
167.6
-
176.9
187.1
178.6
-
185.7
200.7
199.8
-
208.5
224.9
24
48
72
100
33.1
-
33.8
34.0
50.4
-
51.8
52.0
75.6
-
77.6
78.0
88.8
-
93.0
95.0
101.0
-
104.0
106.0
157.0
163.9
-
170.0
181.4
189.6
-
200.0
189.6
192.0
-
200.0
216.0
-
-
220.0
24
48
72
100
35.1
-
36.4
36.7
53.4
-
55.7
56.1
80.1
-
83.5
84.2
94.1
-
100.1
102.5
107.1
-
111.9
114.4
166.4
176.8
-
183.4
192.3
204.6
-
215.8
200.9
207.2
-
215.8
228.9
-
-
237.4
900-0127-01-00 Rev C
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