Using two Rams of different voltages

[ak195]

Hello everyone, I'm using 2 rams of different voltages im my laptop, one is of 2GB (Voltages: 1.5) and second one is of 4GB (Voltages: 1.35). I know its not recommended, but I'm using it and no problem arises till now.
Will it work properly in near future or it will burn or something else?
Is it safe?

 

[Dark Lord of Tech]

http/www.tomshardware.com/answers/id-1702500/mixing-ram-voltage-problem.html
Help mixing ram different voltage a problem?