Here are common Tiny Whoop battery connectors you will encounter.
JST PH 2.0
2mm pin distance; Also known as MCPX, JST-2.0; Found in the Furibee F36, Eachine E010/11, JJRC H36.
Molex Battery 2.0
2mm pin distance; Also known as Micro Losi, Walkera; Found on many toy quads and batteries.
Molex Battery 1.25
1.25mm pin distance; Also known as Molex Picoblade, E-flite, JST-1.25 (wrong term since JST-GH is the real 1.25 JST connector); Found on Blade Inductrix and KingKong Tiny 6/7.
I want to install the Flysky A8S receiver on the KingKong Smart100 but, unfortunately, the cable that came with the receiver requires directly soldering to the flight controller board. There’s already a 4-pin JST-SH connector in place and it’s better to use that. I didn’t have a 4-pin JST-SH connectors but I did have two 3-pin JST-SH connectors from my video transmitters. That’s something we can work with.
Upgraded my F36 transmitter sticks. The extensions were a little loose but nothing that a dab of glue couldn’t fix. The resulting longer travel translates your thumb input to smaller angles so the quad is not as twitchy and abrupt as before. Plus looks more like a proper transmitter now!