Synergy Digital Laptop Battery, Compatible with Razer Blade 15 Base Model Laptop, (Li-Pol, 15.4V, 4150mAh) Ultra High Capacity, Replacement for Razer RC30-0270 Battery - Walmart.com
Rc30-0270 Laptop Battery Replacement For Razer Blade 15 Base 2018 2019 Gtx 1660 Ti Rz09-0270 Rz09-02705E76 Rz09-02705E76-R3u1 Rz09-02705E75-R3u1 Rz09-0300 Rz09-03006 Rz09-03009 (15.4V 65Wh) - Newegg.com
Razer Insider | Forum - Bulging Battery and Planned Obsolescence?
Razer Blade 15 Base 2020 Battery : r/razer
Original Replacement Battery RC30-0220 RZ09-0220 For Razer Blade Pro 17" 6160mAh | eBay