They’re probably all worn out after hundreds of cycles in the laptop. I’m assuming there’s about 1000-1500mAh left on those cells, but I wouldn’t recommend using them because sitting at low voltage can damage the cells.
Common 2 or 4 slot chargers don’t have discharging capabilities. Check out the Opus charger: Review: Opus BT-C3100 V2.1 (with teardown and video) as well as others I’m sure members will suggest.
If you get into serious battery testing, a hobby charger like the Accucel-6 or the iCharger 106B+ will suit your needs.