Modern lithium ion batteries are fairly robust and more chemically sound than early rechargeable batteries. However they do have a finite number of charge cycles.
But you have to understand what a charge cycle is, a full drain to 0 and charge to 100.
So for example Draining to 50 then up, then 50 again then up= 1 charge cycle.
So... Draining it to 95 and bumping it to 100 would take 20 times to reach 1 charge cycle.
Trickle charging vs the oem power used isn't going to make much difference either.
Being ocd about the battery is just going to make you pay more attention to it and thus making you more aware of drain...just use the darn phone and enjoy it!
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