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The making of a perfect SecondLifeStorage/BLF Charger: the start of a new venture
Hello again guys and gals. BlueSwordM here.

So, I've noticed something interesting here.

Over on BLF, a flashlight forum, I've decided to start on the journey of making a product in a domain from which I have a lot of experience in.

In this case, it's flashlights, batteries, and chargers. So, why not build something that would be close to complete?

Over the years on this forum, I've learned so many things, and I finally want to give back to this forum which gave so much to me.

So, why not make a SecondLifeStorage/BLF charger, the ultimate charger from companies that we know, trust, and have confidence in their skills and experience?

It would be the best charger on the market, with amazing features such as these:


Chosen manufacturer: DLYFull (OEM of ISDT products, Liitokala, and OPUS)

1. Adjustable charging current: (0,05A-0,10A-0,20A-0,30A-0,50A-0,80A-1,00A-1,20A-1,50A-1,80A-2,00A-2,25A-2,50A-2,75A-3,0A).

2. Support for multiple chemistries (Lithium-ion 3,6V-4,2V/3,8V-4,35V, LiFePO4, NiMH, NiZn)

3. Temperature monitoring (45C below 2A, 60C below 3A).

4. 4 cell channels, with support for 10180 cells all the way up to 78mm 21700s.

5. Active cooling if temperature exceeds 45C, or/and if all channels are active above 2,5A.

6. Full current cut-off according to charging current (10%).

7. (5-10V)-30V input voltage compatibility. Stops charging if voltage goes below 10V, but keeps charging settings. DOES NOT RESET ON CHARGING INTERRUPTION.

8. Nickel plated brass rails for more accurate internal resistance measurements. Or nickel plated A3 steel just in case. I have a backup plan for that last one.

9. Internal resistance measurements.*

10. Manual low voltage recovery for lithium-ion cells. Numbers based on 18650 capacities
- Below 2,5V: maximum charge rate of 100mA
- Below 2,0V: maximum charge rate of 50mA
- Below 1,75V: has to be manually activated and confirmed if the feature is enabled
- Below 1,0V: maximum charge rate of 25mA
Disabled from the factory

11. Adjustable max charging voltage for lithium-ion: 3,50V-(n1+0,1V)…(n6+0,1V)-4,2V-4,25V-4,30V-4,35V

12. Storage charge/discharge mode: 3,6V

13. Individual channel selection

14. 8 button UI (4 for voltage control, 4 for current control and other functions)

15. 100-200-350-500-700-1000mA constant current discharging functionality

16. Automatic charging current adjustment available


1. Factory voltage calibration.

2. Reverse polarity protection.

3. Charging/discharging data to USB drive.

Wouldn't that be great to have? Our own perfect little charger.

It's going to be an black anodized aluminium charger for good heat dissipation. To be honest though, the actual reason for this is cost, since a plastic mold would cost way too much for such a "low-volume" product.

Cost has been confirmed to be 49$US including a suitable power supply for max power charging. A lower cost 39$US charger without a power supply has been discussed, but not confirmed.

Anyway, that's it for me!

If you want to discuss about more stuff, just do it, and if you are interested, just leave a comment below.

Features can only now be modified, not added.

The more people that show their interest in buying the charger, the better.

Thank you all, and have a good day.

Note: If this is in the wrong forum, then please move it.

Link to the original thread and interest list:

Link to the manufacturer:

If you have any questions, just ask.
hbpowerwall, Korishan, jm1 like this post
The power of lithium ion is in our hands!
We'll show them what we're made of!

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The making of a perfect SecondLifeStorage/BLF Charger: the start of a new venture - by BlueSwordM - 09-02-2019, 02:49 AM

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