Key differences between DualShock 4 v1 and v2

This reddit post contains a few differences. The ones standing out the most are:

Longer battery life, more durable rubber on the analog sticks, theres a light bar on the face of the touch pad, and the controller is also a little lighter. The biggest issue with the V1 is that the rubber on the analog would wear around the edges and then eventually peal off.

These claims are also supported by wikipedia

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