"Small and disappointing battery life"2.0 starson by Shorstki
Pros: Nice plastic materials;
Customizable DPI steps;
USB and Bluetooth;
Hard to disconnect USB cable from mouse;
Laser sensor don't work well on uneven surfaces;
Synapse don't recognize mouse after PC sleep and wake-up on BT;
Hard to connect via BT;
Mouse has problem with wake-up after longer sleep;
Summary: For this price it is such a disappointment... batteries last for about 30 hours of work or gaming, even on very low settings. Razer advertises it to work 3 months! Ridiculous, especially with all issues I mentioned in "Cons".
There is a lot about problems with BT connection before mouse updates its firmware, so I was fighting with it a lot... You better connect first via USB and let Synapse update mouse firmware, then change BT settings (there are how-to's on the web), then you can try Bluetooth... Shame on you Razer. My old mouse for 15$ was working longer and less problematic.