Vintage Radio Flashlight LED Conversion

Vintage Japanese Flashlight LED Conversion Video
Original Flashlight
4 D-batteries 1.2v x 4 = 4.8V
Light bulb 4.8V x 0.6A = 2.88Wh
Waterproof

New Flashlight
6 Lithium batteries 18650 5C 3.7V 2500mah
Rechargeable Battery pack 10C 12V 5Ah 63Wh
Lamp bead 12V 8W 65mA
Reflector diameter 11 cm
7.8 hours usage
Waterproof

Battery Information
Model: 18650
Weight: about 48g
Rated voltage: 3.7V
Capacity: 2500mah
Internal resistance: about 15
Charging voltage: 4.2V
Discharge cut-off voltage: 2.5V
Discharge current: 5C discharge

BMS information
BMS 3 series 12.6V 20A lithium battery protection board (with recovery function-AUTO Recovery)
This product is an enhanced version: suitable for electric drills with starting current below 60A.
Scope of application: Lithium batteries with nominal voltages of 3.6V and 3.7V (including 18650, 26650, polymer lithium batteries)
Product size: 59*20*3.4 mm
Product weight: 4.3g
Charging voltage: 12.6V-13.0V
Continuous discharge current (upper limit): 20A (If the heat dissipation environment is not good, please reduce the load current to use)
Continuous charging current (upper limit): 10A

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