4.5x3.0mm Male to 7.4x5.0mm Female DC Converter Adapter Cable for HP Dell Laptop. It is 7.4mm X 5.0mm Round Jack (old type) to 4.5mm x 3.0mm Plug End (new type). Can convert round connector to square connector.
eBay
Type-C 15W 3A 18650 Lithium Battery Charger Module DC-DC Step Up Booster Fast Charge UPS Power Supply / Converter 5V 9V 12V
Aliexpress UK
ALLPOWERS SP026 60W FOLDABLE SOLAR PANEL ✔️【3-in-1】ALLPOWERS SP026 60W foldable solar panel has 2x USB port (5V 3A per port) with iSolar Technology for charging your 5V powered gadgets, and 18V DC output (18V 3.3A) for charging your laptop or 12V car battery; No additional battery needed for charging external devices, 100% green energy. ✔️【High Efficiency】SP026 60W portable solar panel uses solar cells which is made from US, up to 22% efficiency, while most of the similar products on the market is 13% or even lower. ✔️【Water Resistance Surface Treatment】Effectively protects solar charger. .
eBay
12V 24V 36V 48V 60V 72V 80V to 5V 3A 8-85V to 5V DC DC Step Down USB Converter With Car Charger Power Supply Output waterproof
Aliexpress UK
100x Power converter Cable Adapter. It is 7.4mm X 5.0mm Round Jack (old type) to 4.5mm x 3.0mm Plug End (new type) Adapter Pigtail. Color: Black.
eBay
USB QC3.0 QC2.0 DC-DC Buck Converter Charging Step Down Module 6-32V 9V 12V 24V to Fast Quick Charger Circuit Board 3V 5V 12V
Aliexpress UK
Maximum Charging Current: 30A. Maximum Charging Power: 390W. Main Battery Type: GRL, sealed acid, AGM, lithium iron phosphate, ternary lithium battery. If you do not receive our reply within 48 hours, pls.
eBay
XL4015 5A DC to DC CC CV Lithium Battery Step down Charging Board Led Power Converter Lithium Charger Step Down Module XL4015 E1
Aliexpress UK
New, unboxed; bought for a project that didn't happen.
eBay
USB To 5V DC Power Cable Multi-Charger Cable 8 Adapters USB to DC Jack Charging Cable For Wifi Router Fan Camera Audio Equipment
Aliexpress UK
!!! Can not charge lithium battery !!! Please be noted that we stock our products in UK, and you will get your package in around 2-3 workdays, while there are some other sellers who claim to be UK stock too, but take more than a week (3-5 Days) to deliver, which are usually China stock in fact. Sepcifications: Brand New Battery Charger Input Voltage : 180V-250V AC Max Charging Current : 40Amp Protection : Short Circuit, Overtemp, Overvoltage protection,Over current protection Cooling Fans Production Condition : Brand New 1 Year Warranty : 1 Year Manufacturer Designed specifically for use within caravans, motor-homes and campervans Conforms to current EMC and electrical safety regulations and is fully CE marked Efficient smart charger (supply continuous charging to your leisure.
eBay
Step-up Power Supply Module 1800W 30A DC-DC Step Up Module DC10-60V 12-90V Adjustable Temperature Control Fan Voltage Charger
Aliexpress UK
19V 3.42A Laptop Charger, Replacement Power Cord 65W 60W 45W PSU AC to DC Power Supply Adapter, fit for Acer Toshiba Gateway Laptop/Samsung LG LCD Monitors/JBL Speaker Soundbar.
eBay
KC24 QC3.0 QC2.0 USB DC-DC Buck Converter Charging Step Down Module 6-32V 9V 12V 24V to Fast Quick Charger Circuit Board 5V
Aliexpress UK
Junction Boxes. Type: DC connector converter. Connector A: 7.4x5.0mm female. Connector B: 4.5x3.0mm male. HP Pavilion. Dell Latitude. Dell Inspiron. Dell Vostro.
eBay
BS Type-C 15W 3A 18650 Lithium Battery Charger Module DC-DC Step Up Booster Fast Charge UPS Power Supply / Converter 5V 9V 12V
Aliexpress UK