This is the most reliable way to find a match. Look for identifiers like the Dell Part Number (DPN) , HP Spare Part Number , or Lenovo FRU printed directly on your old battery.
Your new battery's voltage must match the original exactly (e.g., 11.1V vs. 14.8V). While minor differences like 10.8V and 11.1V are often acceptable, significant mismatches can permanently "fry" your motherboard. buy laptop battery
Avoid the absolute cheapest generic batteries found on open marketplaces, as they often lack essential safety circuits and provide far less capacity than advertised. This is the most reliable way to find a match
Some things to know when shopping for generic laptop batteries HP Spare Part Number