Based on this product's specifications, here are some alternatives and similar models
Battery Green Cell AGM47 12V 8500mAh AGM battery, 95×65×151 mm, 2.2 kg, black
Summary description:
Sealed AGM battery Green Cell AGM47 with 12 V nominal voltage and 8500 mAh capacity. Universal compatibility for radio-controlled models and other devices requiring a 12 V lead-acid AGM unit. Dimensions 95×65×151 mm, weight 2.2 kg, black casing. Handles deep-cycle and standby applications; avoid shorting terminals. Hazard: toxic (GHS06).