Technical parameters:
Model: HXYP-4S-D20
Size: 35mm * 35mm * 3.6mm
Charging voltage: 16.8V-17V
Overcharge voltage range: 4.25-4.35V ± 0.05V
Overdischarge voltage range: 2.3-3.0V ± 0.05V
Upper limit working current: 10A
Upper instantaneous current: 20A
Working temperature: - 40℃~+50℃
Storage conditions: - 40℃~+80℃
Quiescent current: less than 30μA
Effective life: more than 50000 hours
Internal resistance: less than 100m Ω
Short circuit protection: It can be protected and needs to be charged for recovery
Main functions: overcharge protection, over-discharge protection, short circuit protection, over-current protection
Discharge duration limit: 13A±1A
Discharge protection current limit: 20A±1A
Charge limit voltage: 16.8V
Charge duration limit: 10A±1A
Charge protection current limit: 15A±1A
(single section) overcharge voltage:4.25V ± 0.025V
(single section) overcharge release voltage:4.15V ± 0.08V
(single section) overdischarge voltage :2.7V ± 0.08V
(single section) discharge discharge discharge voltage:3V ± 0.1V
Overtemperature protection: -10℃~+70℃

Wiring instructions:
B+ Battery V+ Positive (14.8V)
B1 Connection point between battery 1 and battery 2 (3.7V)
B2 Connection point of battery 2 and battery 3 (7.4V)
B3 Connection point of battery 3 and battery 4 (11.1V)
B- Battery V- Negative (0V)
P+ Output/input positive terminal
P- Output/input negative terminal

Note:
Lithium battery protection plate cannot be used for lithium iron phosphate batteries, hernia lamps, electric hand drill battery packs, electric fish machine battery packs, electric bicycle battery packs, children's car batteries, motor or products with motor, 1W fish-eye LED lamps
When combining battery packs, match the voltage, capacity, and internal resistance of each battery
When there is no output voltage, pay attention to charging activation