Check the listing for details. Replacement Battery for Apple iPod Mini EC003 w/Max 1811 Charger. Condition: New. Listed at 32.00 USD. 1PCS NEW Battery Replacement Battery for Apple iPod Mini 4G 6G EC003 DMA002. 550mah 3.7v TENERGY. Has built in battery protection circuit. Shipped with USPS First Class Package.Includes (1) Max 1811 Charger Tenergy Brand:Has Molex connector part number: 510210300 Tenergy Model: 453040There are 2 of the charger boards in the photo. One is connected to a 18650 battery, as an illustration, which is not included. How it works: is best found in the Max1811 data sheet. However the net is that the 1811 is constantly measuring the health of the battery and knows exactly how much current to apply at what exact time interval. It is this intelligent approach that makes a huge difference. The charger has a power-in USB connector and 3 output connectors: ipod connector, JST connector, and 2 terminal for connecting other types of battery holders. It is designed to charge ONLY a single battery at a time. The charger is based on the specialized micro-controller Max1811 with built-in safety features. High performance charger that efficiently charges or recovers a 1S cell. This is an amazing charger that has the ability to recover near dead 3.7 1S lithium batteries From Maxim: The MAX1811 is a single-cell lithium-ion (Li+) battery charger that can be powered directly from a USB port* or from an external supply up to 6.5V. It has a 0.5% overall battery regulation voltage accuracy to allow maximum utilization of the battery capacity.The charger uses an internal FET to deliver up to 500mA charging current to the battery. Charge current for 500mA. A Blue indicates charging. When Blue LED goes out charge is complete. A Red LED indicates that the charger has power. Safety Features: The MAX1811 has preconditioning that soft-starts a near-dead battery cell before charging. Other safety features include continuous monitoring of voltage and current and initial checking for fault conditions before charging.