Datasheet

OSH: Schematics
The MKR ZERO is open-source hardware! You can build your own board using the following files:
EAGLE FILES IN .ZIPSCHEMATICS IN .PDF
Li-Po batteries, Pins, SD and board LEDs
On-board SD
The on- board SD connector allows you to play with files without adding any extra hardware to the board.
Furthermore SD card is driven by a dedicated SPI interface (SPI1) and so any of the pins of the header is
busy during SD usage. The SD library automatically recognizes the MKR ZERO and so any modification to
the sketch is needed to use it aprat from choosing the right SS pin (SDCARD_SS_PIN).
Battery capacity
Li-Po batteries are charged up to 4,2V with a current that is usually half of the nominal capacity (C/2). For
Arduino MKR ZERO we use a specialized chip that has a preset charging current of 350mAh. This means
that the MINIMUM capacity of the Li-Po battery should be 700 mAh. Smaller cells will be damaged by this
current and may overheat, develop internal gasses and explode, setting on fire the surroundings. We
strongly recommend that you select a Li-Po battery of at least 700mAh capacity. A bigger cell will take
more time to charge, but won't be harmed or overheated. The chip is programmed with 4 hours of charging
time, then it goes into automatic sleep mode. This will limit the amount of charge to max 1400 mAh per
charging round.
Battery connector
If you want to connect a battery to your MKRZero be sure to search one with female 2 pin JST PHR2 Type
connector. Polarity : looking at the board connector pins, polarity is Left = Positive, Right =
GND Connector datasheet On the MKRZero, connector is a Male 2pin JST PH Type