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The battery radio Iskra in 1953 was modernized and produced by the Alexander Radio Plant under the same name Iskra or with the addition of the numbers Iskra-53. The metal case is replaced by bakelite. A filter has been introduced into the circuit to reduce interference on the mirror channel, which makes the selectivity 24 dB. Has undergone modernization of local oscillators. Significantly changed the scheme of auto-adjustment of displacement on the lamp grid of the terminal stage to improve efficiency. A new 0.5GD-5 or 1GD-7 loudspeaker was used. The first receivers were with an inclined scale, counting from right to left and other design, but then the scale became direct and normally readable.