Asus recommends discharging the battery to around 25% before ... You might want to hang on to it instead of immediately ...
The Asus ROG Ally X is currently one of the most powerful handheld ... your best option is getting a 2230-size M.2 SSD (though, heads up, this will involve opening up the ROG Ally).
the Asus ROG Ally and the Asus ROG Ally X. Both handhelds will get you great gaming performance on the go (within reason), ad both are truly competitive against the current champ, ...