Another tip if you want to work with an external battery: A 12V battery. In addition, a relay board with monostable relays. The relay is switched via the light connection. Relays typically require 50 milliamps at 400 milliwatts. The light connection should be able to cope with that. You can easily b...

Wow! from 10mA to 0.8mA? That's an amazing improvement! I'm still hesitating... replacing the alpha21 with an alpha22 But that is of no use to you if your step-up converter is working inefficiently. Das nützt Dir aber nichts wenn Dein StepUp-Wandler ineffizient arbeitet. Still, I'm afraid damaging ...

velorian hat geschrieben: ↑Di Aug 30, 2022 8:37 am Der Ruhestrom der Alpha22 beträgt nur noch 0,8 mA im Vergleich zu den 10 mA der alpha 21.

Nurnoch 0,8mA? Da lohnt sich das Messen nicht mehr.

With e-bikes, you usually have 12V for accessories. If you connect 6V accessories, and these can sensibly convert the 12V, you theoretically have twice the runtime. But simply exchange your Alpha 21 for the Alpha 22, which probably only needs 7mA. Your bike shop may be able to help you.

I'm in no way a specialist, but I think your calculation isn't right. AFAIK the mAh mentioned on a powerbank refer to the internal voltage of the cells, which is around 3.5V. So 5'000mAh * 3.5V = 17'500mWh. As far as I know, the decisive factor is the ampere hours. My Bosch e-bike battery delivers ...

Combination indicators (3in1) do not work on the Alpha 21. What hardware do you use for the "Kombi-Blinker"? I was not aware it even existed! The Velorian Alpha 22 and combination indicators from the motorcycle trade (https://www.toxx-motorsport.de/blinker/blinker-ruecklicht-kombi-3-in-1/5...

Could you give more details about your setup? AFAIK even the alpha22 user manual doesn't mention this... Anbei der angepasste Schaltplan. Beschreibung nur auf Deutsch verfügbar. Mit freundlicher Genehmigung von Velorian. Attached is the modified circuit diagram. Description only available in German...

https://velorian.de/support/viewtopic.php?t=35 Dort steht 10mA Ruhestrom (Alpha 21). Bei Dir sind es aber 69,5mA. Da scheint tatsächlich der Booster 59,5mA zu verbraten. Theoretisch müssten 5.000mA für ca. 450 Stunden Standby reichen. Die Kombination 5V-Powerbank und Booster ist auch keine gute Lösu...

Kleiner Tipp: Trenne mal die Blinkerbox und lass nur den Booster an der Powerbank. Schau dann mal ob auch Energie abfällt.

A little tip: disconnect the blinker box and leave only the booster on the power bank. Then see if there is any energy loss.

I'm using a "USB powerbank" rated at 5'000mAh, with a "booster" to get 12V. This is probably not a very efficient setup. I don't have the exact figures, but a quick estimation leads to slightly more than 3 days of standby from full battery to empty. Ich vermute, dass da eher der...