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Please also see the other video in my channel which shows you the wiring diagram for the Ryobi charger.
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Ryobi 14.4v Slide On Battery Upgrade
For the 14.4v and 18v Ryobi slide-on batteries you will need the following parts so just copy and paste the part numbers and link into your browser (At a later date I post live links)
Bridge Rectifier & Smoothing Circuit (The 3A version is fine for the Ryobi 14.4v and 18v charger)
AliExpress Item 1005005606436569
Note: This rectifier board can also be used for the 18v Ryobi battery charger but I recommend you upgrade the capacitor on this board from a 3300uf 25v capacitor to a 3300uf 35v as the output voltage on the 18v Ryobi charger transformer is slightly higher and therefore could exceed the 25v limit of the capacitor once it is converted to DC voltage causing it to explode.
This board goes inside your original battery charger once you removed the original Ryobi board from the charger.
5Amp Step Down Charging Board - Select the Red version with 2 variable resistors-
Product code: XL4015 Red
AliExpress Item 20000001750938
For the 14.4v Ryobi charger adjust the output to around 17.5V and adjust the current to 1A using the blue variable resistors.
For the 18v Ryobi charger adjust the output to around 20.5V and adjust the current to 1A using the blue variable resistors.
You can play around with the charging current a little bit but I found my batteries charge safely at 1A without any heating issues whatsoever.
This board goes inside your original battery charger once you removed the original Ryobi board from the charger.
Both the above boards are from the seller so I recommend you put them in your AliExpress basket and pay for them both at the same time so you benefit from combined postage.
4S BMS for the 14.4V Ryobi Batteries
AliExpress Item 1005006186559028
You will need a 5S BMS for the Ryobi 18v batteries which you can purchase from the same webpage as the 4S version
The BMS goes inside your battery casing and stays there for the life of the battery and is used to monitor your battery and keep it safe.
Best quality cells for this application are Panasonic NCR18650BD - 18650 Battery - 3100mAh
www.cellsupply.co.uk
You will need 4 Panasonic cells for the Ryobi 14.4v batteries and 5 cells for the Ryobi 18v batteries.
Battery Cell holders - I used these cell holders for 14.4v batteries and they should work with the 18v batteries too.
AliExpress Item 1005003120099808
You will also need a battery spot welder, multimeter and soldering iron etc.
Any other questions just message me and I will do my best answer.
Please note that although my charger and batteries are working fine you do this project at your own risk so please take the necessary safety precautions. My advice is to have this work done by a qualified electrician.
21 мар 2024
