Make my remote rechargeable!

Good day!

I have this remote: https:///collections/remote-controller/products/torqueboards-2-4ghz-mini-remote-controller

It runs on two AA-batteries in series (1.5V *2 = 3V). I want to make this rechargeable via a usb-port so I wanna stuff a lipo battery inside it :sunglasses:

I have a 1S 500mah lipo with a built in bms that I wanna use for this. The maximum voltage is as you all know 4.2V so i guess I’ll have to step it down to 3 or 3.3V in order to use it with the remote. I then have to add a USB-port and step down the 5V from that to 4.2V to charge the battery. I also need to limit the current here to 500mah to charge the battery at 1C.

Can anyone help me with where I can find the step-down converters? :slight_smile: I know some electronics but I’m far from an expert! If you know of any parts that can help me with this or if you have a better idea or solution, please let me know!

Thank you! :slight_smile:

Check this thread out

He mods the battery to be rechargeable and Im sure it can be adapted to fit in the normal case.

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What @yelnats8j said :arrow_up:

Here’s mine I just took a picture of oddly enough right before clicking this thread.

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Awesome! Thank you! :slight_smile:

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Damn, that’s a sweet controller :smiley:

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calling @b264, aisle 2.

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I’ve done this, and while it’s cool and all, I don’t really know if I recommend it. The AA batteries last so long and in 1.5 years of daily use, I’ve only had to charge the lithium-ion battery twice, and the second time was yesterday. I guess that means the microUSB jack won’t wear-out, huh?

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Oh I see! Thanks for the info, that’s interesting! Really nice with all the pictures :slight_smile: I’ll think a bit more about it before I do anything :slight_smile:

FYI: 18650 will NOT fit in there. A 14650 or an 18500 will fit. To fit an 18650, you’d have to cut out a support piece that needs to be left there.

That’s a Panasonic NCR18500A 2000mAh cell

Ok, great! I was thinking of using a LiPo but maybe a 18500 is a better choice :slight_smile:

The internal circuitry seems to run just fine on 4.2V. I didn’t need any kind of regulator. It’s just running on the 1S lithium voltage, straight.

I have about 8 Mini Remotes and I only modded this one. I really fail to justify the effort to mod any more. The AA batteries last so long, especially if you get the really good ones. Now I use “Energizer Ultimate Lithium” AA batteries (not rechargeable)

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15550885455447753901589883684195 15550885915067017196592320074477 I modded all 3 of my mini remotes with lithium ion cells,1s bms for charge only, voltage display, and a decent rocker switch for power. Never bothered with the step down voltage and have not had a single issue. Like @b264 said, the cell must be smaller than 18650.

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The thing is, with primary cells it’s guaranteed to run out at some point on the road. So you have to carry spare batteries and a phillips #1 screwdriver. Or be ready to walk. Which sucks balls. So any kind of rechargeable is preferable so you can reasonably control the state of charge.

I had to change batteries on the road 2 days ago.

But, the remote likes 1.5v not 1.2v like common nimh AA (eneloop):sob:

So imo it’s worth the trouble to mod.

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True that, but using Mini Remotes daily for years I’ve only had to “change batteries or kickpush” once and I did actually have a tiny screwdriver and two batteries in my bag.

But you do have a point.

If you modded it to have a battery gauge instead of be fully rechargeable I think it’d be fine also.

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Thank you guys! All very interesting information.

I will either do some kind of mod on the mini receiver or build a firefly remote instead :grin:

At the moment I always carry spare batteries and a screwdriver. I also always carry spare belts and all the tools needed to change them so i’d say I’m quite prepared :sunglasses:

Very nice mods! :grinning:

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This made sense, took a crack at it.

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The voltmeter is one of these. There are a lot of different ones. This one is 0-100v, but shows single digit volts as “3.41” not " 3.4". Has the adjustment pot. It’s the 3 wire version – just connect the blue and red together. Minimum voltage is about 2.5v or so. Unfortunately this makes things not great with eneloop, but as you said, getting a voltage indication is 99% of the battle. I can use duracells here (those fucking things leak in every device I put them in).

To make the cavity I traced the meter with magic marker, used a brad point bit to drill 2 holes, then diagonal cutters and utility knife to creep up on the fit. hotglued everything in.

Tactile switch, I think a 6x6x7 will be perfect. Will report when I test one. The hole for the switch was made with a 5/32 brad point bit.

I made a AVIO remote, but unfortunately I can’t get a good grip with gloves that lets me have full range of the trigger. Maybe just need practice.

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Very happy with the mod. 6x6x6 button will be flush with surface, need some nails to press. 6x6x7 will protrude just a bit, also very workable.

I’m gonna need some colored tape or paint soon…

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