It should charge quite quickly with that charger. I had a similar issue and decided on a two pronged approach:
- I bought a new battery and bottom module
- I contacted support that my phone didn’t charge normally
When the module and battery arrived, I noticed that the new battery was not the solution so I built in the bottom module. This DID solve the issue.
I contacted support again and told them that with the new module, the issue was solved.
And you know what? They got back to me and refunded the bottom module and shipping cost (so I just paid for a spare battery). The repairability of this thing is its best feature.