Found a 50% off coupon for this dog hair clipper, it’s rechargeable and seems to be well made. 2000mAh battery, some fancy titanium-ceramic blades, a lot of adjustments, low noise (for easily scared pets 
https://www.amazon.com/dp/B075R2WBXR
Code: 8IJ5KGBY
Coupon is for 50% discount, $14.99 shipped with prime.
I am sure it can be safely used on humans too.
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