What's in the box:

EN-EL15 Battery & Charger Kit 2pcs 7.4V 2550mAh Battery + 1pc LED2-EL15 Dual Channel Camera Battery Charger USB Port LED Screen Display Replacement for Nikon Z6 Z7 1 V1 D500 D600 D610 D750 D780 D800 D810 D810A D850 D7000 D7100 D7200 D7500 (Standard)

Features:
Full Compatibility: Works with Nikon Z6/Z7/1 V1/D500/D600/D610/D750/D780/D800/D810/D810A/D850/D7000/D7100/D7200/D7500.
LED Display: Built-in LED indicator can shows the charging status of each battery intuitively.
Effective Charging: Dual charger can charge two batteries simultaneously, effectively saving charging time.
Multiple Charging Options: With a USB cable enables the charger to plug into any power source with a USB port.
Multiple Protection: Protect against over-circuit, over-charge, over-voltage, over-current.
Pocket Size: Compact and easy to carry, save more space for you, this battery charger set is your best choice.

Specifications:
Battery Capacity: 2550mAh
Battery Voltage: 7.4V
Battery Size: 5.5 * 3.7 * 2cm/ 2.2 * 1.5 * 0.8in
Battery Weight: 72g/ 2.5g(1pc)
Charger Size: 8.5 * 5 * 2cm/ 3.3 * 2 * 0.8in
Charger Weight: 39g/ 1.4oz

Package List:
2 * EN-EL15 Battery(2550mAh)
1 * Dual Channel Charger
1 * USB Charging Cable