Battery capacity and voltage explained

Are Bosch 10.8 V and 12 V batteries, chargers, and tools cross-compatible and why?
Why do larger, more powerful tools use higher voltages of 18 V or more?
How to make your batteries last longer?
How to charge and store your batteries?

CONTENTS:
00:00 Introduction
02:36 Battery voltage & capacity
06:11 Open vs short circuit connections
08:01 Serial vs parallel connections
14:55 Why use higher voltage?
17:53 More power with some batteries?
19:32 Durability
23:55 Danger - CAUTION
24:50 Conclusion?
25:54 How to store batteries?

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Electricity, voltage, current, battery capacity etc. explained:
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