Piano World Home Page Forums Our Most Popular Forums Adult Beginners Forum Does the Kawai es100 have a battery?

Dumb question does it have a battery like lithon ion inside the piano? If not what kind of battery is it exactly? I really appreciate the help thanks

I don't think so. AT least I saw no reference to such a thing here: http://www.kawaius.com/digital/Portable/OM/ES100_EN_R100.pdf

Batteries used to be included in electronics to let them "remember" their settings. And when the batteries failed (as they will, given enough time), those "remembered" settings would disappear.

"Flash memory" and "non-volatile RAM" have become cheap, and doesn't require any battery power to save its state. Most equipment uses it, and doesn't need batteries any longer.

The other use for an internal battery is to run a clock. If the ES100 timestamps its recordings (for example), a battery might be needed to keep that internal clock running.

As a new design, I would _guess_ that the ES100 doesn't have any batteries inside. The only _reliable_ answer is from the ES100 service manual, or Kawai's service department.

A question:

. . . Why do you want to know?

If it doesn't have a battery then what is the main power source? how does it run I mean I need to plug the kawai es100 in a wall socket so there must be a battery or some sort right? Nothing particular I just want to know it's bugging me lol. Do you know by any chance?

That's a strange question. You say yourself that you need to plug it into a wall socket. That wall socket delivers electricity (not piano fairies!) and that's the electricity the piano runs on. Do you think that all of your home appliances that are plugged into a socket (vacuum cleaner, toaster, fridge, etc...) contain a battery? Of course they don't, otherwise they would be able to run even if not plugged in!

No there need not be a battery. Electronic equipment such as TV's, computers, and digital pianos when plugged into a mains source have a transformer to reduce the mains voltage to a lesser voltage suitable for the electronics. Sometimes this transformer might even be as an "external pack" which is common for laptops.

Ok np then what's inside the es100? Is there a manual where I can see all the parts etc?

CR2032s (they look like a little disk) are ubiquitous in desktops and laptops to hold the BIOS settings when the power supply isn't on. Whether or not digital pianos use them to keep settings alive I do not know, but I bet if there's a battery in there somewhere it's probably that one.

A lifetime supply will not cost you much:

https://www.amazon.com/gp/product/B004AT21R2/

Most of the time now electronics never completely shutdown. There is a small amount of power used, for example, to allow a remote control to turn a device on. Only by unplugging the device could you depower it.

Batteries are not necessary to maintain time clocks on computers or alarm clocks anymore. The motherboards replaced batteries with a super-capacitor that can power a clock for hundreds or thousands of hours between charges.

It depends. The very latest Dell Optiplex 7040s we buy at work still have a CMOS battery inside. It's true the motherboard and power supply supply have a soft switch which means the computer is effectively always on when it's plugged in, but that's mostly to enable wake-on-LAN. I have no idea how any of this relates to digital pianos. I know my CP4 has some settings that can only be restored with a factory reset, which kind of makes me think something's being kept alive in there like a computer BIOS.

Edit: to answer my own question, I checked; the Yamaha CP4 also has a battery.

Here's a Youtube video of somebody replacing a coin battery on a different Kawai. Looks like the ever-popular CR2032.

The title is pretty much spot on. Sitting on a carpet, no ESD precautions, no proper tools.

But soldering down the battery? Really Kawai? That's what cheap Chinese toy keyboards do.

These 150 mAh cells have a designated life of 10 years but can be drained empty within 3-5 years in some cases. Battery replacement needs to be designed in or the product is a case of DoA.

Interesting. I guess not all the brands move in the same direction. Thanks.

No problems with corrosion of battery-holder contacts , with soldered joints.

It's a trade-off. Whether it's a good one, depends on how long the battery is expected to last, compared with the life of the keyboard.

Ham-radio gear occasionally uses soldered batteries, I think.

Posted on the digital piano forum: