NiCd batteries had memory effect. NiMH batteries as used in hybrids do not.
(that is to say, it depends on quality. Good 'low self discharge' NiMH cells have no memory effect at all.)
Some Lithium batteries only have 300 to 400 full cycles before their capacity drops below 70%, but LiFePO4 batteries are good for thousands of cycles, some nickel containing battery chemistries can get even further.
See
https://en.wikipedia.org/wiki/Compar..._battery_types...
Almost all modern battery types can handle many thousands of cycles if those cycles avoid the edges of their range.
Obviously, the NiMH battery in my car (at over 130.000 km) has done many many thousands of subcycle charges and recharges, and still performs like new (actually, better than when I got it!)
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.