Vintage Japanese Flashlight Restoration

Gear Show
Gear Show
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2021-07-13に共有
Vintage Japanese Flashlight Restoration Video
Original Flashlight
6 D-batteries 1.2v x 6 = 7.2V
Light bulb 7.2V x 0.55A = 3.96W
Waterproof

New Flashlight
6 Lithium batteries 21700 3.7V 4500mah
Rechargeable Battery pack 10C 12V 9Ah 108Wh
Lamp bead 4.2V 30W 8A
Reflector diameter 11 cm
3.4 hours usage
Waterproof

Battery Information ($8)
Model: 21700
Size: 21 mm in diameter, 70 mm in length
Weight: about 68g
Rated voltage: 3.6V
Capacity: 4300-4500mah
Internal resistance: about 15
Charging voltage: 4.2V
Discharge cut-off voltage: 2.5V
Discharge current: 3C discharge (5C discharge can be achieved instantly)

BMS information ($2)
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

DC step-down converter (buck converter, $3)
Input voltage: 7 -32 V (without constant current, 5-32V)
Output voltage: (1) Continuously adjustable (0.8 -28V)
Output current: maximum 12A
Typical application: Adjustable power supply (12A power is large enough), high-power LED drive, LED display drive, lead-acid battery charging, lithium battery charging, car power supply, car laptop power supply (buck), regulated power supply, low-voltage system power supply, (such as children The toy car uses 12V battery to step down to 6V), 24V to 12V 12A \\12V to 5V 12A \\24V to 5V 12A \\24V to 19V20V, etc., the application range is very wide.

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you will get 10% discount with code: 10%JG

I hope you find this video useful and enjoy it!
Not only that, but I am happy to receive feedback, suggestions to improve myself.
!!! I'm sorry for the mistake if I did in this video !!!
** I still keep some parts, I want to help the world environment **
Thank you very much for your likes, comments, and subscription!
Have a nice day
Gear Show
コメント (21)
  • @Afella
    You keep my mind at ease good sir, never stop!
  • @kret63
    Simple, easy and fun project. I enjoyed watching this one. Thanks!
  • @sandroz321
    you can direct power to 4.2volt, put all cells in parallel without stepdown
  • @oscar-bc9yk
    It would be more efficent to create a 1S 4P battery pack as this woud be colser to the required voltage. this is better as the power wasted (causing your heating issue) by the buck converter (it would be a boost converter with my suggestion) is proportional to the size of the voltage change between its input and output. I loved the video btw.
  • @Nickword1
    One of the coolest videos i ever seen honestly!! I really want to do this with old VHS video camera batteries from the 90s cause those cameras back then would drain the battery in like 2 hours.. lol
  • @ciromf
    Your videos are so inspiring. I hope to be able to do some of that work in my free time in the future.
  • @garymucher9590
    I do like this project. I thought about transforming such type lights myself. Thanks for posting it and keep them coming. I was wondering about the power controller getting hot. You are controlling a lot of current. Heat sink(s) are important. Thumbs Up!
  • @amilcarmoncada1801
    Estupenda restauración de esta linterna japonesa vintage, respetos desde Venezuela.💯🤜🔥🤛👍🙏💯
  • @ainhoasamford8046
    Los materiales de muy buena calidad perduran en el tiempo felices alumbramientos