This is the Traxxas #2970 AC Powered EZ-Peak Plus Battery Charger and #2843X Power Cell iD 7.4V 5800mAh 25C 2S LiPo Battery Completer Pack.

FEATURES: Charger;
Charges 2-3S LiPo batteries, and 5-8 cell NiMH/NiCd batteries
Recognizes Traxxas iD batteries and automatically programs and optimizes charger settings
One button LiPo storage charge
4amp fast charging
2S/3S Built-in balance ports for conventional LiPo batteries located under Traxxas nameplate to the left of output port
Charge progress indicator
High resolution peak detection
Storage mode prepares LiPo batteries for extended storage
Advanced mode for full manual control, and also for batteries that do not have the iD Auto Battery Identification
Easy to use interface
Built-in cooling fan
Thirty day limited warranty through Traxxas beginning at date of purchase

Battery;
Semi rigid construction does not require a hard case and eliminates wire harness connectors that can loosen and fail
Engineered specifically to fit Traxxas models
New high current connector with gold-plated copper terminals and integrated balance connector
iD Auto Battery Identification allows Traxxas iD equipped chargers to automatically set and optimize charge settings for specific battery
MAXX cable high-efficiency 12 gauge silicone jacketed wire

INCLUDES:
EZ-Peak Plus Battery Charger with AC Power Cord and Instructions
TRAP2970
Power Cell iD 7.4V 5800mAh 25C 2S LiPo Battery, TRAC2844

REQUIRES:
LiPo charging bag

SPECS: Charger;
AC Input: 100-240 volts
Charge Current Range: 1.0 - 4.0A (40W max)
Discharge Current Range: 500mAh
Current Drain for Balance Ports: 500mAh
NiMH Battery Cell Count: 5-8 cells
LiPo Cell Count: 2-3 cells
Net Weight: 12.8oz (365g)
Dimensions: 5.7 x 4.8 x 2.08" (146 x 123 x 53mm)
Battery;
Configuration: 2S2P
Continuous Discharge: 25C (145A)
Max Burst Rate: 50C (290A)
Watt Hours: 42.92
Charge Rate: 1C (5.8A)
Max Charge Rate: 2C (11.6A)
Dimensions: 5.3 x 0.98 x 1.8" (135 x 25 x 45mm)
Weight: 10.2oz (290g)

COMMENTS: NEVER Charge over 4.20V per cell
NEVER Charge at currents greater than 1C
NEVER Trickle Charge
NEVER allow to Discharge below 2.5V per cell
NEVER disassemble or modify pack wiring in any way or puncture cells
NEVER place on combustible materials or leave unattended during
charging
ALWAYS Charge in a fireproof location
ALWAYS set charger's output volts to match battery volts
ALWAYS keep out of reach of children