This document provides information on the 2V GEL battery including: 1. Technical specifications and parameters for various battery models 2. Details on the chemistry reactions during charging and discharging 3. Performance characteristics such as charging characteristics, discharging performance, life, and certifications It includes graphs and tables on topics like charging voltages and currents, discharge capacities and rates, temperature effects, remaining capacity over time and temperature, and relationship between float life and temperature.

1. 2V GEL Battery
Product Description

2. 2VGEL Product Description
ZTE Confidential Proprietary © 2009 ZTE Corporation. All rights reserved. I
Product Description
Version Date Author Approved By Remarks
V1.00 2009-11-12 Liu Yong Hu Jian Not open to the Third Party
© 2009 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be
disclosed or used without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document
is subjected to change without notice.

3. 2VGEL Technique specification
II © 2009 ZTE Corporation. All rights reserved. ZTE Confidential Proprietary
TABLE OF CONTENTS
1 Battery Model, Technical Parameters Table......................................................... 1
2 Technical Features of 2V GEL Battery.................................................................. 1
2.1 Chemistry Reaction during Charge and Discharge................................................... 1
2.1.1 Electrochemical Process in a Battery as Follow....................................................... 1
2.1.2 Chemistry Reaction of the Final Charging Stage...................................................... 2
2.2 Charging Characteristics ......................................................................................... 2
2.3 Discharging Performance........................................................................................ 3
2.4 Life.......................................................................................................................... 6
2.5 Certificate................................................................................................................ 7

4. 2VGEL Product Description
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FIGURES
Figure 1 Curves between equalization charging voltage, current, capacity and time at different
discharge depth......................................................................................................... 3
Figure 2 Discharging characteristic curves at different discharge rate at 20℃.......................... 4
Figure 3 Relationship curve between discharge capacity and temperature .............................. 5
Figure 4 Relationship curves between remaining capacity and temperature............................. 5
Figure 5 Relationship curve between OCV and DOD............................................................... 6
Figure 6 Relationship curve between floating service life and temperature............................... 6
TABLES
Table 1 Storage time, recharging voltage, current and time.................................................... 3
Table 2 Relationship between discharge rate and cut-off voltage............................................ 4

5. 2VGEL Product Description
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1 Battery Model, Technical Parameters
Table
Model
Rated
Voltage
Rated
Capacity
Dimension(mm)
Weight(Kg)
C10, 25℃,
1.8V
Length Width Height
Total
Height
2V200AH 2 200 206~207 103~105 354~355 386~399 18.5~20.5
2V300AH 2 300 206~207 145~147 354~355 386~399 27~29
2V420AH 2 420 206~207 145~147 470~471 500~512 34.5~ 36.5
2V490AH 2 490 206~207 166~168 470~471 500~512 39.5~ 42
2V600AH 2 600 206~207 145~147 645~647 675~688 48~50
2V800AH 2 800 210~211 191~193 645~647 675~688 64.5~ 68
2V1000AH 2 1000 210~211 233~275 645~647 675~688 80~82
2V1500AH 2 1500 210~ 212 340~397 645~772 677~813 115~120
2V2000AH 2 2000 212~ 214 397~399 772~774 809~813 156~160
2 Technical Features of 2V GEL Battery
2.1 Chemistry Reaction during Charge and Discharge
2.1.1 Electrochemical Process in a Battery as Follow
Discharge
PbO2 + 2H2SO4 + Pb 2PbSO4 + 2H2O
Charge
From the reaction equation, the following results can be obtained:
• Discharging: PbO2 in positive plate reacts with Pb in negative plates and H2SO4 in
electrolyte. This reaction generates PbSO4, and the density of H2SO4 decreased.
• Charging: PbSO4 is deoxidized to PbO2 and Pb, and the density of H2SO4 increased.

6. 2VGEL Technique specification
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2.1.2 Chemistry Reaction of the Final Charging Stage
1 At the end of charging, the voltage of battery is up to a certain value, and the
positive pole will give off O2, because of dissolution of water. The reaction is:
H2O→2H＋
＋1/2O2＋2e－
2 The generated O2 is transferred to the negative pole through the separators, and
then reacts with Pb.
2Pb＋O2→2PbO
3 PbO is alkalescence oxide, which reacts with H2SO4 immediately and generates
PbSO4.
PbO+H2SO4→PbSO4+H2O
4 PbSO4 is transformed into sponginess Pb via charging.
PbSO4＋2H＋
＋2e
－
→Pb＋H2SO4
5 The reaction at the negative plate is:
O2+4H
＋
+4e
－
→2H2O
During charging, the water wasted on positive plate will be supplemented by the
water produced on negative plate, so there is no need to add water, which makes
battery easy to be maintained.
2.2 Charging Characteristics
• Float and equalization charging range:
Float charging voltage: (2.23~2.27) V/ cell (20℃)
Equalization charging voltage: (2.30- 2.35)V/ cell (20℃)
• Max charging current:
Float charging current: 0.20 C10 A
Equalization charging current: 0.20 C10 A
• Charging characteristics curves:
Charging characteristics curves of 2V GEL battery at different discharge depth:

7. 2VGEL Product Description
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Figure 1 Curves between equalization charging voltage, current, capacity and time at different
discharge depth
• Charging temperature compensation:
When the temperature is over 25℃, the float or equalization charging voltage will
decrease 3mV when the temperature goes up by 1℃, and the float or equalization
charging voltage will increase 3mV when the temperature goes down by 1℃.
• Storage time, recharging voltage, current, time:
Table 1 Storage time, recharging voltage, current and time
Storage Time
(Month)
Recharging
Voltage(V)
Recharging
Current(A)
Recharging Time(h) Remarks
1 2.35 0.15C10
1~10h concrete time
determined by the condition of
the exit of average charge;
Storage Time≤6 month
3 2.35 0.15C10
6 2.35 0.15C10
9 2.35 0.15C10
12 2.35 0.15C10
2.3 Discharging Performance
• Rated capacity: Under condition of ambient temperature 25℃, discharging with I10
until the terminal voltage is down to 1.8V, the discharging capacity is rated capacity.
• Capacity with different discharge rate（refers to YD/T 1360-2005, at 25℃）
C10——rated capacity of 10 hours discharge current (A·h), the value is 1.0 C10
C3—— rated capacity of 3 hours discharge current (A·h), the value is 0.75 C10

8. 2VGEL Technique specification
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C1—— rated capacity of 1 hours discharge current (A·h), the value is 0.50 C10
Ct —— Ct is the product of discharge current I(A) multiplicative the discharge
time(A·h)
Ce—— actual capacity at 25℃ (A·h)
I10——10 hours discharge current, the value is 1.0I10 (A) or 0.1C10
I3 —— 3 hours discharge current, the value is 2.5I10 (A) or 0.25C10
I1 —— 1 hours discharge current, the value is 5.0I10 (A) or 0.50C10
• Discharging characteristic curves: The discharge curves of 2V GEL battery at
different discharge rate are shown in Figure2.
Figure 2 Discharging characteristic curves at different discharge rate at 20℃
• The corresponding table between cut-off voltage and discharge rate:
Table 2 Relationship between discharge rate and cut-off voltage
Discharge Rate
(h)
Terminal Voltage
（V）
1 1.75
3 1.80
5 1.80
8 1.80
10 1.80
20 1.85

9. 2VGEL Product Description
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• Relationship curve between discharge capacity and temperature:
Figure 3 Relationship curve between discharge capacity and temperature
The general principle is: in the working condition below 25℃, GEL battery’s
effective capacity would decrease 8% when the temperature drops every 10℃.
Therefore, it is necessary to consider the influence incurred by the temperature of
working condition when calculating the effective capacity.
• Self-discharge characteristics: The capacity could remain above 90% after storage
3 months at 25℃.
• Relationship curves between remaining capacity and temperature:
Figure 4 Relationship curves between remaining capacity and temperature

10. 2VGEL Technique specification
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• Relationship curve between open circuit voltage and discharge depth:
Figure 5 Relationship curve between OCV and DOD
2.4 Life
• Design life of battery ≥ 20 years (20℃):
Temperature has a great impact on battery’s cycle life. Designed life is in float
charging at 20-25℃. Actual life varies with the ambient temperature. For example:
as temperature increased by 10℃, the cycle life of battery decreased by 50%.
• Relationship curve between float service life and temperature:
Figure 6 Relationship curve between floating service life and temperature

11. 2VGEL Product Description
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2.5 Certificate
• ISO9001-2000, ISO14001 Certification
• TLC Certificate
• UL Certificate
• CE Certificate