USBC Rechargeable Battery Case For SONY Walkman MiniDisc Player Cassette

USBC Rechargeable Battery Case For SONY MD E30 E50 E77 E505 E700 E710 720 E730
 
Compatible with most models of CDs and MDs

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This is a 3D printed battery case that can be charged via USBC and comes with a 14650 lithium battery

The lithium battery has circuit protection and a charging indicator.

After converting to 1.5V, the battery capacity is about 2800 mAh
 
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