Published, Last updated: June, 2024

1. Scope

This specification is regarding the 14/17.5Ah Li-ion rechargeable battery pack

2. Framework of product

The battery pack consists of 40 or 50 cells of INR18650 MJ1, and protective control circuits.

3. Appearance

3.1 Size: 4296593±1mm

3.2 Weight: approximately 3.15kg

4. Basic characteristics

No.	Item	Specifications/Model	Notes
1	Battery cell	INR18650 MJ1	Manufactured by LG
2	Nominal voltage	36V
3	Nominal capacity	14Ah/17.5Ah	0.2C discharge
4	Minimum capacity	13.5Ah/16.8Ah	0.2C discharge
5	Energy (Wh)	504Wh/630Wh
6	Maximum charging voltage	42±0.2V
7.	Standard charge	2A
8	End-of-charge current	350mA
9	Standard discharge	8.75A
10	Maximum continuous charging current	3A
11	Maximum continuous discharge current	20A
12	Discharge cut-off voltage	27V	Under ideal working conditions
13	Internal resistance	≤130mΩ
14	Over-current protection current	50±5A
15	Suggested temperature range for storage	Less than a month:-20～60℃
1-6 months: -20-45℃
16	Suggested temperature range for operations	Discharge: -20～60℃
Charge: 0～45℃
17	Cycle life	≥500 cycles	Capacity ≥ 0.6* standard capacity

4. Long-term storage of the batteries

Batteries should be stored indoors in a clean, dry and ventilated space. They should avoid contact with corrosive substances and keep away from fire and heat sources.

The batteries should be in a half-charge state of about 30% to 60%. In order to prevent the battery from over-discharging due to self-consumption of electricity, it is best to charge and discharge the batteries every month during storage.

5. Attentions

The protection circuit in the control circuit has overcharge, over-discharge and over-current protection functions. The main technical parameters are as follows:

Do not put the battery pack into water. Do not throw the battery pack into fire or heat the battery pack.
Do not charge the battery under fire or extreme heat. Do not use or store batteries near heat sources such as heaters.
If a battery leaks or emits a strange smell, move it to an open space immediately.
The first time you use a battery, you need to fully charge it before use.
Do not reverse the positive and negative poles! Do not use wires or other metal objects to short-circuit the positive and negative terminals of the battery pack!