This is Spektrum RC Smart G2 PowerStage 4S Bundle with a 4S Smart LiPo Hard Case Battery. The Smart Technology Powerstage Bundle is a one-box solution for vehicles requiring 4S performance. Designed with the simplicity of Smart Technology.

Spektrum Smart Battery: You'll never have to set charge preferences for a Spektrum Smart battery until you want to. When a Spektrum Smart LiPo battery is connected to a Spektrum Smart charger, unique parameters and health of that Smart LiPo battery are uploaded from the Smart memory microchip integrated into the battery. Through the charger, you can view and set preferences, such as charge rates, so that all you have to do to charge the pack every time is press the charger "Start" button. Smart technology takes care of the rest. The updated G2 performance batteries feature an all in one connector that eliminates the need for a balance connector, as the balance process is done through the charger and the battery connector. The smart batteries also come programmed from the factory to self discharge to a safe 3.90V per cell after 72hrs of inactivity. All of the functions and features placed in this battery are intended to supply the user with a powerful and safe lithium battery.

Spektrum Smart Charger: With the compact S155 AC Mini Smart Charger, modelers of all experience levels can enjoy the charging advantages of innovative Spektrum Smart technology. This charger comes compatible with 4S LiPo, LiFe, Li-Ion, or LiHV batteries as well as 1-12S NiMH and NiCd packs, equipped with a IC3 or IC5 connector. Generation 2 Smart technology enables the S155 to both charge and balance Smart G2 batteries using one simple connection. No separate balance lead is needed. When connected to a Smart battery, its Auto Charge feature recognizes the correct charging parameters instantly and begins safe, proper charging automatically.

Features:

• Battery:
• Powerful 50C continuous discharge rating to deliver high performance and longevity
• Balance charge through the IC5 connector data wire — with only one connection, no balance lead required
• Faster Auto Discharge at up to 1.5A to safe storage voltage for long battery life and improved performance
• Integrated microchip stores unique parameters for each battery
• IC5 connectors may be connected to a device with an EC5 connector
• Charger:
• Advanced, user-friendly Smart G2 charging technology that fits into any hobby budget
• Delivers 55W of charging power
• Includes selectable IC3 and IC5 charging ports — no separate adapters required
• Charges up to 4S LiPo/LiFe/Li-Ion/LiHV batteries and 1-12S NiMH/NiCd packs
• Color LCD screen interface features intuitive menus, icons, and navigation tools
• Clock counts down remaining charge time until your Smart battery is fully charged and ready to use
• Auto Charge recognizes Smart battery charging parameters and starts charging automatically when connected
• USB input for updating firmware
• Sleep mode
• Detachable power cord
• Sleek, sturdy case fits well on your workbench and in pit/field bags

Specifications:

• Battery:
• Type: Hard Case LiPo stick
• Connector Type: IC5
• Balance connector: G2 Smart
• Capacity: 5000mAh
• Voltage: 14.8V
• Maximum Charge Rate: 5C
• Demensions:5.45x1.81x1.50in (138.5x46x38mm) (LxWxH)
• Charger:
• Input Voltage: 100-240V, 50-60Hz
• Cell Count: 2-4S
• Maximum Charge Rate:18.4V, 5A (Max)
• Output Connector: IC3 and IC5 (Selectable)
• Display: LCD
• Balance Connector: JST-XH
• Length: 4.4" (112 mm)
• Width: 2.4" (61 mm)
• Height: 2.4" (61 mm)
• Weight: 12.2oz (345g)

Includes:

• (1) Spektrum 4S 5000mAh Smart G2 Battery
• (1) Spektrum S155 Smart Charger