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Wplrc B16 pcb problem, battery,

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J

Johnp23

RC Newbie
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Hi all, first post , I recently purvhased the wpl B16 6x6 truck to convert to heavy tractor, tank transporter , I read on the internet that an upgrade battery ie:- 18650, 1500 amh 7.4v li-ion battery, after charging I fitted it to the truck switchef on, and imediately saw smoke erupting from umder the battery compartment, I quickly dis connected the battrry, and tried yp the original supplied with the truck, and nothing worked, it seems the new ( Upgrade Battery) has fried the pcb board, most annoying, can anyone tell me what I have done wrong ??? 🤯🤯😡👍👍👍 see pic for the upgrade battery ,

17678973350518394459205607803230.webp
 
Johnp23 said:
Hi all, first post , I recently purvhased the wpl B16 6x6 truck to convert to heavy tractor, tank transporter , I read on the internet that an upgrade battery ie:- 18650, 1500 amh 7.4v li-ion battery, after charging I fitted it to the truck switchef on, and imediately saw smoke erupting from umder the battery compartment, I quickly dis connected the battrry, and tried yp the original supplied with the truck, and nothing worked, it seems the new ( Upgrade Battery) has fried the pcb board, most annoying, can anyone tell me what I have done wrong ??? 🤯🤯😡👍👍👍 see pic for the upgrade battery ,

View attachment 262413
Click to expand...
What are the specs of the original battery? If it is the same voltage and everything, my bet is the new battery got plugged in the opposite way, as in instead of + (red) going to +, and - (black) going to -, it was flipped with + going to - and - going to +. Pics would also be helpful! And welcome to the forum!
 
Last edited:
Lukedavis said:
What are the specs of the original battery? If it is the same voltage and everything, my bet is the new battery got plugged in the opposite way, as in instead of + (red) going to +, and - (negative) going to -, it was flipped with + going to - and - going to +. Pics would also be helpful! And welcome to the forum!
Click to expand...
Thankyou for the welcome, I checked the specs on the battery, 7.4v wiring seems to be ok, just dont understand what happened, I specificaly said on the order it was for the wpl b16 , upgrade battery, this is what arrived, 🫩😟
 
Have you tested the battery voltage?
If the battery pack was the only new variable, the battery seems like the most likely culprit.

https://www.wpl-rc.com/products/r-e-s-v3

About 1/2 way down this page it says (in red) Do not use connectors from MS/Fayee. They are reversed. You will fry your board.

Verify the voltage and polarity of the new battery's connector vs the old bat's connector.
I'm betting your issue is here sonewhere.
 

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