Check the “troubleshooting” section of the Product Manual. All Bosch Leisure batteries are shipped in “Sleep” mode to maintain highest possible capacity until first use. To confirm that the battery is in “wake” mode, quick press the test button. The charge indicator should light up. If not, press and hold the test button for >3 secs to wake up the battery, which can be confirmed via an illuminated power-up animation on the SoC indicator.