Meridian Explorer 2 is not bad on battery usage when paired with an Android phone. I used it a long time with my LG V20. The problem with V20 was that it was sometimes able to power up ME2 but most times not. I therefore had bought a Cayin N3 to pair with ME2 which was easily doing the job. At the times when V20 was able to power ME2 the battery drop was not dramatical. It was something like 1 level in 3 minutes, that means V20 at full charge can feed ME2 for 5 hours which was enough for me, because I was using it about 1 hour daily. Using with Cayin N3 was easier. Cayin N3 was able to speed it up always with no problem. For battery usage it was similar. With Cayin N3, ME2 was not speeding up the battery usage so much again. I was getting about same 5 hours with Cayin N3. (My Cayin N3 normally had about 6 hours of battery time). So 5 hour was not bad with ME2.