Braava 380t Spare Battery - How to charge?

[tks]

Bought the iRobot Braava 380t. Would say I am 80% satisfied. On the other hand, I am 98% satisfied with my Xiaomi Mi Robot Vacuum Cleaner. My short video on the Braava 380t: https://youtu.be/TKbP-WtPvso

My main complaint is that the battery runs out fast and I have to recharge for a few hours before I can use it again. Hence, I am not able to complete mopping my entire house in one afternoon. I found that I can buy spare batteries for about $15 from Amazon and taobao.

https://www.amazon.com/Tenergy-2000mAh- ... ZV7YJPNP74

https://ezbuy.sg/product/20000004544196.html

Seems easy enough to replace the battery: https://homesupport.irobot.com/app/answ ... es-battery.

But I do not want to have to charge the battery in the Braava. Can I buy or fabricate an external charger so that I can be using the Braava and charging the spare? And when the Braava runs out of battery, I will swap the batteries, one to use and the other to charge?

[mfortuna]

You will probably need to make an adapter for the plug but any RC charger for NIMH/NICAD batteries will work.

Putting wire/pins into the red and black locations and hooking up with alligator clips would work.

[rickp51]

you can connect a RC with this male connector that matches the batteries for the braava/mint:

https://www.digikey.com/product-detail/en/molex-connector-corporation/22-05-7055/WM18903-ND/403344

with these connector pins:

https://www.digikey.com/product-detail/en/molex-llc/0039000160/WM9661CT-ND/3904983

then you have an external charger for your extra battery

[saba11]

I think you can't do that with Braava 380t

[rickp51]

well, that's what i did with my 380t and it seems to be working for me... i have one battery charging while the second one is running the unit ...

[Hulinning2]

why don't you charge both before you run your brarva 380t?

I bought an extra battery pack from here
https://www.amazon.com/gp/product/B00M2 ... UTF8&psc=1

It only last for about 1 year

eah extra battery runs for about 2.5 hours
So I use 2 of them it would be long enough for my house