If it's less amps it takes longer. If it's more amps it isn't used up to its full capacity, but it won't harm. A too high voltage is harmful, but the usual 5 V USB-voltage is fine.
I bought a new LG G5 and I want to buy another charger for it but I can't find an original charger and found a charger that gives more amps(2.4) than my original charger(1.6). Can the more amps affect on the phone's battery and what is the impact of chargers with low or high amps on the phone's battery ?

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