diff --git a/Hardware_development/1-Power_supply/Readme.txt b/Hardware_development/1-Power_supply/Readme.txt
index 8e5e568..5314f45 100644
--- a/Hardware_development/1-Power_supply/Readme.txt
+++ b/Hardware_development/1-Power_supply/Readme.txt
@@ -1 +1,20 @@
-Currently, power is supplied from one or two Li-Ion 3.7V batteries in series, or the equivalent DC power supply. 
\ No newline at end of file
+Currently, power is supplied from one or two Li-Ion 3.7V batteries in series, or the equivalent DC power supply. 
+
+Considered battery chargers
+
+1) Li-ion charger
+https://soldered.com/product/li-ion-charger/
+
+https://github.com/SolderedElectronics/Li-ion-charger-hardware-design
+
+https://eu.mouser.com/ProductDetail/Soldered/333013?qs=sGAEpiMZZMs5TKDXZEoCqOJ%252BWtJg0exjwbn3KWhGmkEFhOaAA0LmMA%3D%3D
+
+2) Li-ion charger with protection
+https://soldered.com/product/li-ion-charger-with-protection/
+
+https://github.com/SolderedElectronics/Li-ion-charger-with-protection-hardware-design
+
+https://eu.mouser.com/ProductDetail/Soldered/333014?qs=sGAEpiMZZMs5TKDXZEoCqOJ%252BWtJg0exjNv7rV%2FQFNRhneIj2%2FqDp%252BA%3D%3D
+
+Considered DC/DC converters
+https://www.amazon.com/QEBIDUM-MT3608-Synchronous-Non-Isolated-Adjustable/dp/B0B9Y8NFDN
\ No newline at end of file