Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger [bq24074] : ID 4755 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: CTEK D250SE, 20A, 12V Battery Charger For Starter And Service Batteries In RV, Truck And Overlanding Vehicles, Solar Battery Maintainer, 12V Lithium Ion Battery Charger And Smart Alternator Compatible : Automotive
24V Li-ion Battery Charger | Aegis Battery
Amazon.com: CTEK 56-926 LITHIUM US | Fully Automatic Lithium Ion Phosphate LiFePO4 Battery Charger | 5.0Ah - 60Ah | Maintenance Charging up to 120Ah : Automotive
BLACK+DECKER 1.2 Amp Portable Car Battery Charger/Maintainer Compatible with 6 and 12-Volt AGM, GEL and WET Auto/Marine Batteries BM3B - The Home Depot