EVE 21700-40PL 4000mAh 70A High Drain 21700 Lithium ion battery Flat Top

Mechanical Characteristics

Free Fall Test - No fire, no explosion.

Vibration Test - No fire, no explosion, no leakage, with less than 10% of OCV drop.

Safety

Overcharge Test - No fire, no explosion.

External Short-circuit Test - No fire, no explosion.

Forced Discharge Test - No fire, no explosion.

Heating Test - No fire, no explosion.

Low Pressure Test - No fire, no explosion and no leakage with less than 10% of OCV drop

Precautions and Safety Instructions

Lithium-ion rechargeable cells subject to abusive conditions can cause damage to the cell and/or personal injury.

Please read and observe the standard cell precautions below before using utilization.

Note 1. Customer shall contact EVE in advance if it intends to use the cell in applications or operating conditions
other than those described in this document.
Note 2. EVE will take no responsibility for any accident that occurs when the cell is used under conditions other than
those described in this document.
Note 3. For the sake of safety assurance, please discuss the equipment design, its system and protection circuit of
Lithium-ion cell with EVE in advance, and consult about the high rate current, rapid charge and special application in the same way.

Guide for the use of Lithium-ion Cells

14.1. General

This chapter has been prepared to describe the appropriate cautions and prohibitions, which the customer should take

or employ when the customer uses and handles the lithium ion cell to be manufactured and supplied by EVE Energy CO., LTD., in order to obtain optimal performance and safety.

14.2. Charging

14.2.1. Charging current
Charging current shall be less than maximum charge current specified in the specification.
14.2.2. Charging voltage
Charging shall be done by voltage less than that specified in the specification.
14.2.3. Charging temperature
The cell shall be charged within a range of specified temperatures in the specification.
14.2.4. Reverse charging
The cell shall be connected, confirming that its poles are correctly aligned. Inverse charging shall be strictly
prohibited. If the cell is connected improperly, it may be damaged.

14.3. Discharging

14.3.1. Discharging current
The cell shall be discharged continuously at less than maximum discharging current specified in the specification. In
case of the higher discharging current should be set, it shall be discussed with EVE.
14.3.2. Discharging temperature
The cell shall be discharged within a range of temperatures specified in the specification. Otherwise, it may cause
loss of performance characteristics.
14.3.3. Over-discharging
The system should equip with a device to prevent further discharging exceeding discharging cut-off voltage specified in the specification.
Over-discharging may cause loss of performance characteristics of cell. Over-discharging may occur by selfdischarging if the cell is left for a very long time without any use.
The charger should equip with a device to detect voltage of cell box and to determine recharging procedures.

14.4. Storage

14.4.1. Storage conditions
The cell should be stored within a range of temperatures specified in the specification. Otherwise, it may cause loss
of performance characteristics, leakage and/or rust.
14.4.2. Long term storage
The cell should be used within a short period after charging because long-term storage may cause loss of capacity by
self-discharging. If long-term storage is necessary, the cell should be stored at lower voltage within a range specified in
the specification, because storage with higher voltage may cause more loss of performance characteristics.

14.5. Cycle Life

The cell can be charged & discharged repeatedly up to times with a certain level of capacity specified in specification.

Cycle life may be determined by conditions of charging, discharging, operating temperature and/or storage.

14.6. Design of System

14.6.1. Connection between the cell and the battery
The cell should not be soldered directly with other cells. Namely, the cell should be welded with leads on its connector
and then be soldered with wire or leads to solder. Otherwise, it may cause damage of component, such as separator and nsulator, by heat generation.
14.6.2. Positioning the battery in the system
The battery should be positioned as possible as far from heat sources and high temperature components. Otherwise,
it may cause loss of characteristics. The recommended spacing between the cells is more than 1mm.
14.6.3. Mechanical shock protection of the battery
The battery should be equipped with appropriate shock absorbers in the pack in order to minimize shock, which can
damage the cells. Otherwise, it may cause shape distortion, leakage, heat generation and/or rupture and/or open circuit.
14.6.4. Short-circuit protection of the cell
The cell equips with an insulating sleeve to protect short-circuit which may occur during transportation, battery
assembly and/or system operation. If the cell sleeve is damaged by some cause such as outside impact, it may cause shortcircuit with some wiring inside the battery.
14.6.5. Connection between the battery and charger/System
The battery should be designed to be connected only to the specified charger and system. A reverse connection of the
battery, even in the specified system, should be avoided by employing special battery design such as a special terminal.
14.6.6. Pack design
The current consumption of the battery pack should be under 10uA at sleep mode. The system should be equipped
with a device to monitor each voltage of cell block to avoid cell imbalance which can cause damage to the cells.
The battery pack or system should have warning system such as over temperature, over voltage, over current, and so on.

14.7. Battery Pack Assembly

14.7.1. Prohibition of usage of damaged cell
The cell should be inspected visually before battery assembly.
The cell should not be used if sleeve-damage, can-distortion and/or electrolyte-smell is detected.
14.7.2. Connector handing
Excessive force on the cells’ terminal should be avoided when external strip connector is welled.
14.7.3. Transportation
If the cell is necessary to be transported to such as the battery manufacturer, careful precautions should be taken to avoid damage of cell.

14.8. Others

14.8.1. Disassembly
The cell should not be dismantled from the battery pack.
Internal short-circuit caused by disassembly may lead to heat generation and/or venting.
If liquid leaking from the battery gets into your eyes, don't rub your eyes and wash them with clean water and go to
see a doctor immediately.
14.8.2. Short-circuiting
Short-circuit results in very high current which leads to heat generation.
An appropriate circuitry should be employed to protect accidental short-circuiting.
14.8.3. Incineration
Incinerating and disposing of the cell in fire are strictly prohibited, because it may cause rupture and explosion.
14.8.4. Immersion
Soaking the cell in water is strictly prohibited, because it may cause corrosion and leakage of components to be
damaged to functions.
14.8.5. Mixing use
Different types of cell, or same types but different cell manufacturer shall not be used, which may lead to cell
imbalance, cell rupture or damage to system due to the different characteristics of cell.
14.8.6. Battery exchange
Although the cell contains no environmentally hazardous component, such as lead or cadmium, the battery shall be
disposed according to the local regulations when it is disposed.
The cell should be disposed with a discharged state to avoid heat generation by an inadvertent short-circuit.
14.8.7. Temperature measurement
The temperature monitoring system (K-type thermocouple) is recommended to be placed in the middle of the cell
(35mm up from the bottom of the cell), and the accuracy of the temperature monitoring system should be within ±2℃.

14.8.8. Caution

The battery used in this device may present a risk of fire or chemical burn if mistreated.

1. Do not disassemble, expose to heat above 100°C or incinerate it.
2. Do not expose the cell to extreme heat or flame.
3. Do not short circuit, over-charge or over-discharge the cell.
4. Do not subject the cell to strong mechanical shocks.
5. Do not immerse the cell in water or sea water, or get it wet.
6. Do not reverse the polarity of the cell for any reason.
7. Do not disassemble or modify the cell.
8. Do not handle or store with metallic like necklaces, coins or hairpins, etc.
9. Do not use the cell with conspicuous damage or deformation.
10. Do not connect cell to the plug socket or car-cigarette-plug.
11. Do not make the direct soldering onto a cell.
12. Do not touch a leaked cell directly.
13. Do not use Lithium-ion cell in mixture.
14. Do not use or leave the cell under the blazing sun (or in heated car by sunshine).
15. Keep cell away from children.
16. Do not drive a nail into the cell, strike it by hammer or tread it.
17. Replace battery with those of EVE only.

15. Others

15.1. Storage for a Long Time

If the cell or pack is kept for a long time (3 months or more), it is strongly recommended that the cell is performed

one cycle，the voltage of the cell is recommended from 3.50V to 3.80V, the environment should be low-temperature

(normally 0~25°C), dry and no corrosive gas.

15.2. Others

Any other matters not covered under this specification shall be separately negotiated and confirmed by both parties.