![T420S battery upgraded with Tesla model 3 21700 cells, also upgraded the wiring that connects the cells to the BMS from 1.5mm to 3mm conductor size (voltage drop went from 0.7V under T420S battery upgraded with Tesla model 3 21700 cells, also upgraded the wiring that connects the cells to the BMS from 1.5mm to 3mm conductor size (voltage drop went from 0.7V under](https://preview.redd.it/8kbdjvw0yn361.jpg?auto=webp&s=c1678b8d498ad5bcc05be730678e70f6e4e29a1d)
T420S battery upgraded with Tesla model 3 21700 cells, also upgraded the wiring that connects the cells to the BMS from 1.5mm to 3mm conductor size (voltage drop went from 0.7V under
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Lenovo ThinkPad T420s Configurations, Software, & Verdict | Business Laptop Reviews | Laptop Reviews | Laptop Mag
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Amazon.com: New 11.1V 44Wh 42T4844 42T4845 Laptop Battery Compatible with Lenovo Thinkpad T420s T420si 0A36287 42T4847 42T4846 Rechargeable Battery : Electronics
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