Thank you mate.
Based on your feedback i pull appart my more than 2 years old Void Wireless RGB headset and I saw similar battery.
Checking further i was able to find battery similar to myne and I order one from e-bay.
It was BAK LP-523450P-IS-3 BATTERY, LITHIUM POL, 3.7V, 980 MAH
So long storry short - after a little work to change the plug from the old battery to the new one - the battery is working purfectly fine and I the drain is much much slower.
Just one remark - with the new battery - I was not able to charge up to 100 % however the 95 % shown give me waaaay more time without charging.
