Although straightforward, you do this conversion at your own risk. The charger has exposed live circuitry inside when open and its main capacitors may hold a modest charge for a while when the unit has been unplugged.
You make this modification entirely at your own risk. I am not liable for any errors on your side or my side.
The components you will require are:-
A suitable replacement transient suppressor (MOV - Metal Oxide Varistor) like this one:-
www.rapidonline.com/joyin-jvr...
And optionally, but recommended, a 220K 1/2W resistor for across each of the two main electrolytic capacitors for balancing.
Like this pack of 100:-
www.rapidonline.com/truohm-cr...
And optionally a new mains voltage two core flex, with a core CSA of at least 0.75mm.
The two most important things in the modification are that the link MUST be cut and the transient suppressor MUST be replaced. Powering the unit up with either of those steps omitted will result in possible damage to the unit.
As always, just take your time with modifications like these, and make sure you are comfortable with what is required before proceeding.
Bonus technical notes... The charger will initially charge the battery at high current and then switch to a lower current to top the cells up to their fully charged state. It then completely disconnects the battery (relay clicks out) and goes into a standby mode dimming the green LED up and down.
I measured the voltage across the two series electrolytic capacitors (fitted with my extra resistors) and the voltage was shared almost equally with just a two volt difference.
The six screws on the PCB do not hold it in. They are for the two heatsink plates and plastic contact support.
The screws that hold the case together are T20 (E4) security bits.
Once converted to 230V operation the unit should not be used on 120V unless the link is replaced, as it would result in unstable operation of the switchmode supply.
The existing fuse is an acceptable value, even if it isn't the recommended ceramic high breaking capacity type.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
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