This is for 3 9V batteries.
eBay
Diymore Multi-Cell 2S 3S 4S Type-C to 9V/12V 4.5V-15V Step-Up Buck Fast Charging Charger Module for 18650 Lithium Battery
Aliexpress UK
MN1604 LR22 LONG LASTING. 8X Duracell 9V PP3 PLUS POWER BATTERIES SMOKE ALARM. Duralock power preserve technology, ensuring batteries remain fresh and powerful even after extended. Smoke Detectors. Alarms and House Alarms.
eBay
【Without Battery】Mini DC UPS Uninterruptible Power Supply 18650 Replaceable Battery Backup 5v 9v 12v 220V for Router Wifi Modem
Aliexpress UK
9V battery holder for use with PP3 size batteries. The holder is moulded from thermoplastic and features 150mm of leads. Incorporates screw fixing holes and excellent shock resistance. Height: 20.7mm.
eBay
1pcs/lot ZNTER 9V rechargeable lithium battery 6F22 6300mWh USB lithium polymer rechargeable battery
Aliexpress UK
Size: PP3. Polaroid Super Heavy Duty Batteries provide an economical power source for a wide range of devices. Mini Keyring Torch Bright White LED Silver Aluminium Flashlight - No Batteries. Expiry date: End of 2027.
eBay
18650 Battery Uninterrupted Power Supply DIY Power Bank Box for House Router Cellphone Tablet Modem DC UPS 5V 9V 12V Output
Aliexpress UK
SKU: 008828 BRAND: GP Batteries EAN: 4891199002212 WEIGHT: 0.042.
eBay
Single Cell Lithium Battery Boost Power Module Board 3.7V 4.2V Liter 5V 9V 12V USB Mobile Phone Fast Charge QC2.0 QC3.0 TPS61088
Aliexpress UK
PP3 9V battery snap on connector clip. 9V Battery snap on clip adaptor plug (9V battery is not included). This battery clip can be used to power any devices with a 9V battery. We will deal with queries quickly and be as flexible as we can to get you sorted out.
eBay
2021 9V 6800mAh li-ion Rechargeable battery Micro USB Batteries 9 v lithium for Multimeter Microphone Toy Remote Control KTV use
Aliexpress UK
This adapter lets you use inexpensive contemporary batteries instead. This will let you use a 6AA battery instead of a PP9 Battery. 6 AA to PP9 BATTERY ADAPTER. With PP9 batteries getting harder to find and ever more expensive why not switch to cheaper and more available AA batteries?.
eBay
Hot sale ZNTER 9V rechargeable lithium battery 6F22 600mAh USB rechargeable lithium polymer battery + Micro USB charging cable
Aliexpress UK
These batteries, especially the battery for fire alarm, are crucial for safety. Kindly recycle or dispose of responsibly. [You'll receive 5x PP3 9V Batteries]. Smoke Safety First: The importance of smoke detector batteries is unmatched.
eBay
1 Cell Lithium Battery Charging 3.7V 4.2V CN3791 MPPT Solar Panel Regulator Controller Module 5V 6V 9V 12V
Aliexpress UK