Just replace the old batteries in your solar light, fix and light them again with these.
eBay
1-10pcs Line Polymer Battery 3.7V Lithium Polymer Battery 602030 600mAh Game Machine MP3 MP4 MP5 Lithium Battery GPS Navigator
Aliexpress UK
The product is a 7.2V 600mah rechargeable NiMH AA battery pack with a charging cable, suitable for RC model vehicles and toys. The battery pack includes one AA battery and has a capacity of 600mah, providing long-lasting power for your remote control vehicles. The NiMH battery cells are rechargeable, making it a cost-effective and environmentally friendly choice for your gaming and control needs. Made in China, this battery pack is lightweight at 126 grams and comes with a KET plug colour for easy identification.
eBay
7.4V Battery 2S 600mah 20C Lipo Battery for WLtoys K969 K979 K989 K999 P929 P939 RC Car toys accessories 2S 7.4v 601844 Battery
Aliexpress UK
Equipped with a built-in smart protective PCB charging module, they safeguard against overcharging, over-discharging, overcurrent, and short circuits, ensuring safe and efficient use. Model: 582728. PICK UP OPTION.
eBay
YL3 Mini Drone Battery 3.7V 600mAh For YL3 RC Airplane Spare Battery Parts Origial YL3 Replacement Lipo Battery
Aliexpress UK
4 x Rechargeable Solar Light Batteries AA 600mAh 1.2V NiMH (New Type Pack of 4). Condition is "New". Dispatched with Royal Mail 2nd Class Large Letter.
eBay
High Capacity CR2450 Button Batteries 3V CR 2450 5029LC LM2450 DL2450 CR2450N BR2450 600mAh Lithium Cell Coin Watch Battery
Aliexpress UK
1.2v Ni- Cd AAA 600mAh battery. 1.2v Ni-MH AA 600mAh battery. Lightweight and higher energy density. we will try best to resolve all your issues. We will respond to you within 24 hours and do our best to help you out!
eBay
1.2V 80mAh Ni-MH Rechargeable Batteries Coin Cell with Solder Pins Rechargeable Button Cell Battery for Electric Toys
Aliexpress UK
Type: 14430. Typical Capacity: 600mAh. Protection: Unprotected.
eBay
18650 Battery Rechargeable Battery 3.7V 18650 9800mAh Capacity Li-ion Rechargeable Battery For Flashlight Torch Battery+Charger
Aliexpress UK
---Extra long life. ---Perfect for replacements or spares. ---Keep solar products running for years. ---Compatible with most solar products. ---1.2v NiMH. ---Energy capacity - 600 mAH. Most solar-powered products come complete with a rechargeable battery, so you can leave your garden lights to their own devices, for the battery to be charged and recharged by the sun’s energy. However, over time, the solar battery can no longer hold its charge and will need to be replaced. These 600mAH, 1.2v NiMH batteries will bring your outdoor solar lights, whether decorative or practical, back to light! Perfect for solar lights requiring a AA size battery. With four in the pack, you’ll have plenty to replace any tired batteries and maybe even have some for spares, just in case.
eBay
18650 rechargeable battery 3.7v 3200mAh 10A Batterie de décharge INR18650-MH1 18650 rechargeable battery lithium ion battery
Aliexpress UK
Model: 503040. Capacity: 600mAh. Built-in smart protective PCB charging module, effectively prevents over charging, over discharging, over current, short circuit. Type: Lithium battery.
eBay
18V 12000mAh Rechargeable Battery, Original Lithium Battery for BOSCH 18V Battery 12.0AH Original Tool Rechargeable Battery◐_◑
Aliexpress UK