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That’s clearly a design fault. It might be because of mount location, number of mounts to spread out the load, etc. Don’t know if the plastic alone is the problem (but it could be, maybe too thin to save on weight). Trendpower/Simplo is a big player in battery pack manufacturing (for IT and...

sure

Yes, Vado batteries can also be unlocked/repaired. I only had experience with gen1 models (SBC-B11,B10,B09).

BOSCH steps in to save the day! I agree with G-Sport, their idea of standardization is a bit weird, but it's not surprising, in this world:). They still want to protect the charging protocol method so that's the idea they came with. Let's make an adapter with electronics inside and use a public...

Does the battery works on discharge mode? (on the bike) As far as I know, there are only 4 onboard diagnostic tests (stages), not 5. It seems your BMS is a different revision. I don't see SFC fuse on the top, it might be on the bottom. Anyway, you can manually check for imbalance by measuring...

That's normal. When you earth the 5th wire, basically you wake up the battery. But in case the charging circuit is faulty, it might work to charge using discharge port (without earthing 5th wire).

Ok, great. The BMS doesn't seem to be locked. Most likely, charging Mosfets are shorted. Changing those is a PITA as they're on the bottom side of the BMS PCB. Now that you replaced the fuse, you could check for voltage on the charging connector. If it reads full battery voltage, charging...

That's a self control fuse (SCF). It can blow on short circuits between v+ and v- like a normal fuse or by BMS control if the firmware decide the battery shouldn't be used anymore. It has an integrated heater (that can be controlled from BMS firmware) that will melt the fuse. You can replace it...

All mosfets have 3 terminals (gate, source, drain). There are many tutorials/videos etc on how to check a mosfet. In your case, I think the discharge mosfets (4 big ones) are in order. The charge mosfets are on the bottom of the board, only way to access them is to remove the BMS from the...

It's true, the BMS firmware will trigger a lock if a serious error occurred. But I can unlock any Specialized BMS. The only problem is that I need physical access to the battery.

Hello, Have you measured the cell banks directly? How are the values? If the cells are fine, I would first check charging/discharging Mosfets and SFC fuse.

@merysoft First, you need to ground the reset line through a jumper. Look at the last photo posted, it's red circled. Then you need to remove the silicone mechanically. I used a bit of heat and plastic tools. You need to be very careful not to damage any SMD component. I used the same mosfet...

Hello, 1 & 2. Yes, I have the firmware files, unencrypyed. Turbo Studio use encrypted firmware files. I’ve managed to reconstruct the firmware from the CAN messages logged during an update. But R5f2134 has a bootloader that won’t change when updating the firmware. So I don’t have a bootloader...

Hello, If the cells are in good condition, I can help you with the repair, but you’ll have to send the battery. If you’re not in EU, it’s more complicated.

Managed to repair a 625Wh giant BMS, Hell of a work, removing the potting and desoldering the 2 stacked boards. But in the end, it was worth it :) In order not to block the BMS, I kept the MCU reset line low, during repair process. Some photos of 625Wh BMS:

Anyway, Specialized batteries with BMS problems/locks, CAN be repaired :)

You can easily kill a battery if metal debris will stick on battery connector or battery charger. Also, if you wash the bike with high pressure water.

Ok, I get it. Unless major water damage across the board, I can help you repair/unlock M1 battery BMS. I don't think Specialized or other manufacturer will sell you internal battery parts. Or motor parts (besides the belt kit ).

What do you mean by custom battery? What is your goal? You want to be able to use a generic battery on a Specialized ebike? Won't fitting be a problem ?

Yes, you got it right. But most gen2/3 faulty batteries I serviced had problems with the BMS, not the cells. That's because water can get inside to the BMS board (which is on the bottom part of the battery).