BT3.0 Swap

Swap your LiPos from XT30 to BT3.0

Balance lead who ? : BT3.0 does it all in one !

Get rid if your balance lead.

The BT3.0 serves as both a discharge connector and a balance connector. Compared to a standard XT30 pack it eliminates the need for a bulky balance lead, which you gotta secured before every flight to prevent it from being sliced by your props, by combining it all into a single connector

Charging is easier than ever

The ViFly ToothStor has revolutionized the world of 2S batteries with a cleverly designed, portable charger that makes using 2S LiPo batteries incredibly easier compared to a traditional LiPo charger, as easy as using 1S packs !

Powered by DC5.5, USB-C (PD), and XT60, you can slip it into your backpack and charge your Kayoumini packs with a 6S pack on the go, it's as simple as it gets.

Like this wasn't enough on its own, BetaFPV is also introducing a new type of connector dedicated to 2S: the BT3.0.

ViFly ToothStor

Performance gap ?

BetaFPV claims a slightly lower discharge rate than an XT30.

To set things clear, we did the test.

If the connector resistance was to differ we'd spot it at full throttle by comparing the current (A) and the voltage sag (V) between the two.

In practice, both perform exactly the same with a standard Kayoumini setup (1103 8000kv). Sag is identical and flight times are similar,

The BT3.0 is therefore definitely a viable option for this format !

Tutorial

Unfortunately, no battery that fits the KM deck on the market to this date is sold with a BT3.0 connector. You’ll need to purchase the connectors separately and mod them yourself.

Warning: Disassembling a LiPo battery involves significant risks. Make sure you know what you’re doing to avoid puncturing the cells or short-circuiting the terminals. Improper handling can damage the battery or cause a fire.

The steps in this guide will be explained in as much detail as possible to help you avoid mistakes, but please proceed with caution.

Step 1 : Unwrap the battery

Not all LiPo batteries are wrapped in the same way; the goal is to access the cable solder points, as shown below.

For the Flywoo 2S 420mAh, I have a clear heat-shrink sleeve and a sticker that needs to be removed to expose the solder points.

Step 2 : Solder the BT3.0

I strongly advise against unsoldering cables that are already directly soldered to the nickel strips, they have an outer coating that won't let tin stick back once removed. I learnt the hard way.

So, we’ll cut the unused cables at the base and resolder the ones we need directly from the cable itself rather than from the solder joint.

Cut the positive and negative wires of the balance lead (both ends of the connector) at the base of the solder joint; we won’t need them.

Solder the middle cable (balance) to the middle pin of your BT3.0 (S Port).

Solder the positive and negative of your XT30 on your BT3.0

Step 3 : Wrap it back

B7000-type adhesive will hold the nickel strips in place and insulate them so that they never touch each other.

After that, you can put the original sticker back on and wrap the LiPo back in heat-shrink tubing.

Swap done !

Enjoy your balance lead-free packs !

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