E T X S E R I E S L I T H I U M B A T T E R I E S
16
The graph below illustrate that usable Ah is nearly the same regardless of the discharge
rate, with the voltage remaining above 11.5V for most of the discharge cycle.
Like lead acid batteri
es, lithium batteries’ discharge performance is lower as
the
temperature decreases, meaning the voltages and the Ah are lower. The graph below
shows the ETX12 discharge curves at a 1C rate over a wide operating temperature range.
Note: there can be as much as a 15% decrease in Ah and discharge voltage at -30deg C as
compared to 25 deg C. All the EarthX ETX series batteries exhibit similar discharge
curve profiles.
8
9
10
11
12
13
14
0
1000
2000
3000
4000
V
mAh
ETX12A Discharge Curve (1C Rate)
25 Deg C
8
9
10
11
12
13
14
0
1000
2000
3000
4000
V
mAh
ETX12 Discharge Curve (4Ah, 25DegC)
1C
2C
10C
