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![]() ![]() The unit will automatically switch from one to another with no break in recording, using the priority sequence as listed. The Zoom F8 is flexible in having three power sources: DC power inlet, Hirose inlet, and AA battery sled. Do not fly with dead batteries in your laptop!Īrmed with these facts, we can return to the topic at hand. You should also be aware that all powered devices should be ready to turn on. Anything more than that, you need to fill out lots of forms and adhere to stringent packaging and handling constraints. In your carry-on, no single battery should have a higher capacity than 100 Wh. In truth, batteries within mobile phones and similar devices are likely OK, but I would not risk the letter of the law. Though rules differ, to be safe you should not pack any batteries in your checked luggage. This last value is important when travelling by air, because regulations exist to govern the transport of batteries, all of which are potentially dangerous, especially in a confined space. So that same AA has a power capacity of 2.4 Wh (1.2 V multiplied by 2 Ah). This is the rated voltage multiplied by the current capacity. Similarly, we can talk about the power capacity of a battery. Or if it needs to supply 2 Amps, it can do so for 1 hour. This battery can supply the nominal 1.2 V at 1 Amp for 2 hours. Those of us not in marketing would just say 2 Ah. Take a typical AA battery that is rated at 2000 mAh. Maybe because the numbers look more impressive! The current capacity of a battery is measured in amp-hours (Ah), though you will quite often see this specified instead in milliamp-hours. But when hooked up to a battery, we need to have some good idea of how long that current source will last. When hooked up to the wall, we don't usually need to worry about the juice running out. But to exceed the voltage risks frying the components. ![]() That is a good thing there is no problem in providing more current than a device might use. The AC adapter actually provides "DC12V 2A", which means it provides exactly the correct voltage and exceeds the rated current draw. If you look at spec sheet for the Zoom F8, you will see that it is rated for 12 V and the power consumption is 12 W. You multiply these together to get power, measured in Watts, abbreviated W. Every device also uses a certain amount of current, measured in Amps, abbreviated A. Every device requires a certain voltage (AKA potential), measured in Volts, abbreviated V. Somewhere in between there must be a happy medium.įirst, a quick explanation of key terms. On the other hand, customised battery packs sourced from eBay parts might be cheap, but they raise safety and reliability concerns. The film industry worked all this out years ago, but their tools can be overly expensive. Finding the "right" power source can be a challenge, though not because solutions don't exist. These circuits are power hungry, not only because they provide phantom power. ![]() The move to a larger recorder like the Zoom F8 can be a shock (no pun intended). ![]() It's easy to take this small miracle of power management for granted. With a life of 18 to 22 hours, I often forget that they need recharging. The latest generation of hand-held recorders, like the excellent Olympus LS-11, last an incredible time on only two AA batteries. Here I will discuss a few power options and discuss batteries. This is the third article on the Zoom F8 multitrack audio recorder, which started with an overview of features and continued with my suggestions for firmware improvements. ![]()
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