I just checked the current price in official sony store in shopee...RM141.55 after 5% discount
If you need more spare batteries, Fotokem and Foto Shangrila sometimes have good offers...I once saw ori npbx1 at fotokem for RM88 including gst during a PWP promo.

For drone-mounted cameras, I use Octopus npbx1 compatibles (available at lelong.com.my). They work just as long and as well as the original with 2 caveats: Remaining batt life is not displayed on camera screen, and they cannot be charged using the official sony charger. Octopus batts are cheap, and thus help minimize loss if a drone goes MIA.