Battery upgrade

2x	Stock batter	Upgrade battery
Model	EREMIT 606090	HXJNLDC 7565121
Size	90 / 60 / 6 mm	122 / 65 / 7.5  mm
Chemistry	Lithium-Polymer	Lithium-Polymer
Capacity	14.8 Wh (4 Ah)	30.34 Wh (8.2 Ah)
Nominal voltage	3.7 V	3.7 V
Discharge max continuous	2 A	5 A
Charging limit voltage	4.25 V	4.2 V
Mass	74 g	136 g

• Connector: JST-PH 2.0mm (not included in upgraded battery)
• Both batteries have protection ICs

Charging chip - MP2650

• Datasheet: MP2650GV.pdf
• 4V to 21V Operating Input Voltage (V_IN) Range
• Up to 5A Configurable Input Current (I_IN) Limit (Up to 45W Total Power)
• Up to 5A Configurable Charge Current (I_CHARGE)
• Configurable Battery Charge Voltage Regulation (V_{BATT_REG}) Up to 4.5V/Cell
• Up to 5V/3A USB On-The-Go (OTG)

Monitoring chip - MAX17320G20+

• Datasheet: max17320.pdf
• Battery Health + Programmable Safety/Protection
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• Overvoltage (Temperature Dependent)
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• Overcharge/Overdischarge/Short-Circuit Current
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• Over/Undertemperature
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• Undervoltage + SmartEmpty
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• Battery Internal Self-Discharge Detection
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• Ideal Diode Discharge During Charge Fault
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• Charging Prescriptions (JEITA)
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• Prequal Charge Control with CHG FET

ModelGauge m5 EZ Algorithm
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Percent, Capacity, Time-to-Empty/Full, Age
• Cycle+™ Age Forecast Precision Measurement Without Calibration
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Current, Voltage, Power, Time, Cycles
• Die Temperature, 4 Thermistors ±1˚C
Cell Balancing with Internal FETs SHA-256 Authentication

• Nonvolatile Memory for Stand-Alone Operation
• History Logging, User Data (84 Bytes)