Capacity test of China batterie

ItemNameType nameTypeCapacity [mAh]From
1GTF 9900mAhTR 18650 3.7v Li-ion602Wish
2UltraFire BRC 18650 4200mAh3.7v Li-ion558LightintheBox
3FikidaUS18650VTC63.7v Li-ion2813AliExpress
4UltraFireBRC 18650 4200mAh3.7v Li-ion566LightintheBox
5GTF 9900mAhTR 18650 3.7v Li-iobWish

How to install Raspberry PI zero W, without monitor and keyboard

The following description explain how to create, install and setup a fresh SD card for your WiFi without use of monitor and keyboard from windows. It is passable to use this description to a Raspberry PI zero also but then you also have to add an WiFi dongle. You can see the process in this video: How to install RP without monitor and keyboard

Create SD card with Raspbian image and setup the installation

  • Download Raspbian stretch lite from
  • Unzip and install image to SD card with Win32DiskImager
  • Open SD card, create emty file named ssh.
  • Also create file named wpa_supplicant.conf and insert the following content into the file:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

Change ssid and psk to meet the setting of your WiFi

  • Insert SD card in RP and power it up
  • Find the IP address of your RP
  • Now you can connect to your RP with SSH (putty or similar)