HP ProBook 4530s Battery will fit models:

HPHP ProBook 4330s,HP ProBook 4331s,HP ProBook 4340s, HP ProBook 4341s, HP ProBook 4430s,HP ProBook 4431s, HP ProBook 4435s,HP ProBook 4436s, HP ProBook 4440s, HP ProBook 4441s, HP ProBook 4446s, HP ProBook 4530s, HP ProBook 4535s, HP ProBook 4540s, HP

HP ProBook 4530s Battery will fit models:

HPHP ProBook 4330s,HP ProBook 4331s,HP ProBook 4340s, HP ProBook 4341s, HP ProBook 4430s,HP ProBook 4431s, HP ProBook 4435s,HP ProBook 4436s, HP ProBook 4440s, HP ProBook 4441s, HP ProBook 4446s, HP ProBook 4530s, HP ProBook 4535s, HP ProBook 4540s, HP ProBook 4545s, HP ProBook 4740s