The box clearly states non rechargeable, are these actually rechargeable?!?!

I didn’t pay attention to my box but yes they are rechargeable.

is the polarity of the connector reversed?

The polarity of the connector battery side is as you see it. Red(+) Black(-).... However... I have seen instances were the polarity of the pins on the equipment side has been reversed. A pain. You will have to verify the circuit diagram that you are connecting the battery to.

Can it be used on 3 wire equipment? how to connect if yes? i am trying to use it on logitech mx master mouse.

3 wire Lipo's have balancing tech/ability. These two wire batteries are not setup for that.

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EEMB 3.7V Lipo Battery 1100mAh 603449 Rechargeable JST 2.0mm,1-Pack

Product ID: 282474582

Details

Battery Capacity
1100
Battery Cell Composition
Lithium
Brand
EEMB
Number of Batteries
1 Lithium

⚡3.7V stable voltage

🔋1100mAh high capacity

🔌JST 2.0mm precision connector

¥3636

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your smart life with precision and endurance!

CERTIFIED RELIABILITY - UL, IEC 62133-2, and UN38.3 certifications guarantee safe, worry-free shipping and use worldwide.
LIGHTWEIGHT COMPACT - At just 22g and slim 34.5x51x6.3mm size, it fits seamlessly into your sleek tech setups.
POWER PACKED LONGEVITY - Over 800 recharge cycles keep your devices running longer without compromise.
PRECISION FIT SAFETY - JST 2.0mm connector with strict polarity ensures zero risk of short circuits—plug in with confidence.
VERSATILE COMPATIBILITY - Perfect for Bluetooth speakers, dash cams, smart home devices, and all your IoT essentials.

The EEMB 3.7V 1100mAh LiPo battery offers a lightweight, compact power solution with a reliable JST 2.0mm connector. Engineered for over 800 recharge cycles and certified for safety and shipping, it’s ideal for powering Bluetooth speakers, smart home gadgets, and IoT devices with stable voltage and secure fit.

Specifications

ASIN	B08FD39Y5R
Amperage	22 A
Antenna Location	Alarm, Arduino Board, Bluetooth speaker, Camera, GPS, LED Light, Radio, Remote controller, Wireless headphones, Wireless keyboard, micro controller
Battery Capacity	1100 milliamp_hours
Battery Cell Composition	Lithium Polymer
Battery Cell Type	Lithium Polymer
Battery Weight	22 g
Best Sellers Rank	#73,681 in Health & Household ( See Top 100 in Health & Household ) #17 in 3.7V Batteries
Brand	EEMB
Customer Reviews	4.4 out of 5 stars 1,319 Reviews
Item Dimensions	1.36 x 2.01 x 0.25 inches
Item Weight	0.03 kg
Manufacturer	Hubei Zhongju (EEMB) Energy Power Co., Ltd
Model Name	LP603449 with JST PHR 2.0mm Connector
Model Number	LP603449-PCM
Number of Batteries	1 Lithium Polymer batteries required.
Recommended Uses For Product	Alarm, Arduino Board, Bluetooth speaker, Camera, GPS, LED Light, Radio, Remote controller, Wireless headphones, Wireless keyboard, micro controller Recommended Uses For Product Alarm, Arduino Board, Bluetooth speaker, Camera, GPS, LED Light, Radio, Remote controller, Wireless headphones, Wireless keyboard, micro controller See more
Reusability	Rechargeable
Unit Count	1 Count
Voltage	3.7 volts

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