item: Nybble customs: 0 import sales tax: 37.65 € based on a value of 198.17 € post office fee 6 € for paying the tax country: Germany other notes: I just paid the tax and fee to the postman

This fits very nicely

how wide is this battery? could you also fit it under Nybble's belly?

I am going to try these next: https://www.akkuteile.de/lithium-ionen-akkus/14500/enerpower/enercig-tn14500hp-650mah-3-6v-3-7v-pluspol-flach-li-ionen-akku/a-100117/ the data sheet entry "discharge current/pulse 6,5A/13A" is promising I'll report back once they have arrived -> test shows I get lots of low voltage meouwing, so maybe works with some tuning of the voltage sensing algorithm

I just plug a capacitor into the servo rail

but is very big and heavy

2x 18650 unprotected works

3.3 V 14500 LiFePO4 doesn‘t work, too weak

works, but is too big to fit underneath

"Anybody can explain WHY protcted or not protected are behaving different?" Protected batteries have a current limitation

I soldered path 1, now my nybble is working. Before I was getting frequent resets and crashes, even loss of calibration values. I am using a 1500 mAh 2S 35C 7.4 V LiPo, which is a bit too big. Might have to get a smaller one. The 14500 batteries I haven't found yet in Germany.