Package Included: 2 x LP-E17 Replacement Batteries, 1 x 20W Fast Dual Battery Charger, 1 x C-C Charging Cable. This slow topping off can take up to 20% of the total charging time. FirstPower LP-E17 Battery And Upgraded 20W Dual Fast Charger For Canon EOS R100 R50 R10 R8 RP, Rebel T8i T7i T6i T6s SL2 SL3, Powershot V1, EOS M3 M5 M6, M6 Mark What charger power is used for slow/fast charging? Slow charging requires ≥10W (5V/2A input), while fast charging needs ≥18W (9V/2A input). 2-Pack LP-E17 Battery and 2-Slot Battery Charger for Canon EOS Rebel SL2 SL3 T6i T6s T7i, EOS M5 M3 M6, M6 mark2, 77D 200D 250D 750D 760D 800D Smart LCD Display, Real-time Monitoring: Stay in control with FirstPower’s intelligent LCD display, showing precise charging status for each LP-E17 battery. To avoid this, use an adapter with at least 10W output (18W+ recommended). Perfect for traveling, outdoor shooters and mobile creators who need a reliable power solution. (For optimal charging, we recommend using an 18W or higher fast-charging power adapter. Why does the charger show 100%, but the camera battery isn't full? A weak power adapter can cause a failed handshake with the charger, falsely reporting 100% charge when the battery isn't full. Aazon.co: FirstPower LP-E17 Battery and Upgraded 20W Dual Fast For the best charging performance, we recommend using an 18W or higher fast-charging power adapter. Mirrorless Camera Battery Grip at Mary Duckworth blog Plan your shoots confidently with clear power level indicators.