I have a Harmony One remote (purchased here, no hub) and a Logitech K830 Keyboard I purchased from NewEgg.
Both are rechargeable.
Both exhibit the same problem. The batteries don’t hold a charge as long as they should.
The remote usually just dies on me without warning and a recharge fixes it. I kept my old Harmony 700. Same with the keyboard. If I don’t keep an eye on the recharge light it will usually die on me.
Both do have a battery indicator but they both need to be recharged unexpectedly (sooner than expected).