1.abcf
2.abc
3.a
4.b
5.-
6.b
7.abf
8.a
9.abf
10.ab
11.b
12.
3 Quality
2 Capability 2
1 Price 1
6 Appearance and weight
4 Compatibility (a battery can be used for different portable devices)
5 Size/Weight
8 Brand awareness
7 Friends/family member referral
13. a
14.a
15...