Makita Li-ion Battery Repair BL1830 Not Charging

Repairing li-ion battery 18V, disassembly, replacing cells and PCB board, assembly, test

[@frodemolland6249]

Hi, aint soldering these cell VERY dangerous? They can explode of the heat?

[@TIRestoration]

The cells can withstand some heat of the soldering iron, the heat is not that high to cause an explosion, only if there is a short circuit.

[@yayanarchy8394]

It's really overstated. For a half-decent reason I guess. The problem is that if someone attempts it and doesn't use proper flux, doesn't use a nice wise chisel tip to heat it quickly, solder, and move as to not heat the cell itself, then you could have some serious problems. You also want to keep off the center part of the bottom of the cell, since that's where the machine sealed the negative contact to the outside of the cell, and is a weak point.

[@Eblanc]

@@yayanarchy8394 thanks for this tip. exactly what I needed.

[@andrebruscao6120]

My batery is charging but doesnt work.. What do you think could be the problem?

[@TIRestoration]

test the battery with a multimerer to ensure it is holding a charge and inspect the terminals Good luck

[@Yassn-hp3px]

كم سعه الشاحن الذي بيشحن البطاريه 14فولت هل يصلح اشحنه بشاحن12فولت

[@TIRestoration]

الشاحن من 7.2 - 18V , نعم يصلح و شكرا

[@majidshahraeini2236]

Hi ,thanks for your video Is it need change chip also or no, because I saw U change it

[@TIRestoration]

Yes, you need also to change the chip/pcb board otherwise the charger will give a fault and not charge the battery. good luck

[@TheEhssan0]

I have BL1840B, do you know that all PCB board are the same?

[@TIRestoration]

The new PCB boards are compatibel with: Makita 18V BL1830, BL1840, BL1850 and BL1860. Good luck

[@TheEhssan0]

@@TIRestoration are you sure? Can you provide me the link for purchasing? Bcz my board are bigger than your board ! Plz help me

[@TIRestoration]

@@TheEhssan0 Check on 'aliexpress.com' then search for "pcb for bl1840b". Good luck with purchasing

[@TheEhssan0]

@@TIRestoration I already did it, 1840 nothing there!!

[@TIRestoration]

@@TheEhssan0 It's hard to find one exactly like the original because Makita doesn't sell PCB boards, only complete batteries. You can look for one that most resambles the original. good luck

[@carlorobotti5572]

Soldering iron is a BIG ERROR. Spot welding to be done

[@jivko77sz]

hi can you have the exact link from the purchase of your board

[@TIRestoration]

The board I purchased was from aliexpress.com, type in the search bar '18v makita bms' and it's the first picture. Good luck

[@nelchan2421]

update to this battery today?

[@Novacasa88]

Do you know the specs of these cells? I'm trying to replace mine Thanks

[@TIRestoration]

These are 18650 cells, it depends on which battery you have, the 4Ah or the 5Ah battery has cells with a higher capacity than a 3Ah battery, the minimum cell capacity of a 5Ah battery is around 2500mAh, the voltage is the same around 3,7V for each cell. good luck

[@Novacasa88]

@@TIRestoration Thank you I have the 3mah older makita battery like in the picture. So I'm guess this means each cell is probably 2000mah at 20amp rating?

[@juliangutierrez8965]

Cargador makita comprar

[@TranTek]

This is a counter fit fake makita battery