In the service, the replacement costs 5t. rub. Decided to do it myself. I could not find Li-Pol cans of the right size to fit in a standard compartment. I bought more in capacity (4600 mah) and size. Didn't fit in original compartment. I just put it in the internal volume of the column (realizing that this should affect the bass register). I removed the charge-discharge controller from the old battery and soldered it to the new Li-Pol. (the column will not work without a native controller). Everything worked, but the bass (due to the reduction in internal volume) has changed a bit. In the process of fine-tuning and repeated assembly, I realized that the tightness of the seals still greatly affects. The tightness there is not complete, but its degree affects the operation of passive radiators (they are responsible for the bass register). There are several sealing contours (along the perimeter of the case, around the speakers, in the area of \u200b\u200bthe power connectors, and in the battery compartment). Even at the factory, when assembled, the seals fit a little differently, so the bass on different speakers can play a little differently. I checked by listening to several columns by enumeration. Conclusion - when people discuss the quality of the bass, you need to understand that it plays a little differently for everyone.
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