I've had this phone for about 1-2 weeks. I use 2 sim cards (personal and work). I use it to make calls, a little bit of surfing, snapchat, youtube, music, etc. After 2 days of use I have about 30% left on the battery. Even with constant use, it easily survives a slow day. Would totally recommend. Plus with the Ultra Stamina mode it should survive for at least a week. I haven't tested it on this phone yet, but I've previously owned the Z2 and it easily survived 1+ week in Ultra Stanima mode.
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