Teres Audio had a battery upgrade to their motor just like this. All components run on DC anyway, the only difference being how they get their DC. Most run AC through diodes and store the DC in caps. Partly to store power for transients, also partly to smooth diode ripple.
So you have a phono stage and it runs on DC either from an external power supply or batteries. Same deal, same diff. Phono stage does not know where the 12V DC comes from. Does not care if it is lead acid or NiMH.
What it DOES care about is any noise riding on that DC. This is the real reason battery power sounds so much better. DC coming off a battery has zero line noise. Only opportunity for RF to creep in is the few feet of wire from the battery to the component.
UNLESS the battery is connected to a charger. Which for convenience it always is. THEN you must wire it to disconnect from AC during play. Otherwise that AC line noise goes right across the battery and into the phono stage. It was very easy to hear this with my turntable motor. For sure it is there with a phono stage.
You can use any old car or motorcycle battery. Whatever you want. Mine was a motorcycle battery. You can use any cheap charger. Does not matter. Just wire it with a relay to disconnect whenever the phono stage is on. Phono stages draw so little power it will run for hours and hours if not days and days without charging no problem.
Do not put anything between the battery and the phono stage. Do put a relay or something between the AC charger and the battery. Simple as that.
So you have a phono stage and it runs on DC either from an external power supply or batteries. Same deal, same diff. Phono stage does not know where the 12V DC comes from. Does not care if it is lead acid or NiMH.
What it DOES care about is any noise riding on that DC. This is the real reason battery power sounds so much better. DC coming off a battery has zero line noise. Only opportunity for RF to creep in is the few feet of wire from the battery to the component.
UNLESS the battery is connected to a charger. Which for convenience it always is. THEN you must wire it to disconnect from AC during play. Otherwise that AC line noise goes right across the battery and into the phono stage. It was very easy to hear this with my turntable motor. For sure it is there with a phono stage.
You can use any old car or motorcycle battery. Whatever you want. Mine was a motorcycle battery. You can use any cheap charger. Does not matter. Just wire it with a relay to disconnect whenever the phono stage is on. Phono stages draw so little power it will run for hours and hours if not days and days without charging no problem.
Do not put anything between the battery and the phono stage. Do put a relay or something between the AC charger and the battery. Simple as that.