The Balder Power 25.2V 4Ah lithium thruster battery is designed for the engineering constraints that define underwater drone, AUV, and ROV power systems: depth pressure that demands structural enclosure integrity at 100 meters, current demand profiles that require 5C peak discharge for thruster response, and volume and weight budgets where every gram and cubic centimeter affects vehicle buoyancy and maneuverability.<\/p>\n
At 25.2V fully charged with a 4Ah capacity, this pack delivers 100.8Wh in a 120 \u00d7 84 \u00d7 84 mm footprint weighing 900g. The 7S1P cell configuration \u2014 seven cells in series, single parallel string \u2014 is optimized for voltage headroom over thruster drive systems in the 24\u201326V class while maintaining the compact cross-section required to fit within the pressure housings and payload bays of small-format AUVs, inspection ROVs, and multi-thruster underwater drone platforms. The 5C maximum continuous discharge rate (20A from a 4Ah pack) provides the instantaneous current delivery required for thruster vectoring, sudden direction changes, and counter-current maneuvering without voltage sag triggering BMS protection cutoff at peak load.<\/p>\n
The IP68 enclosure is pressure-rated to 100 meters depth \u2014 a benchmark that covers the full operational envelope of commercial inspection ROVs, scientific AUV survey platforms, and military-grade underwater drone systems. At 100 meters, hydrostatic pressure reaches approximately 11 bar; the enclosure sealing architecture is designed to maintain integrity under this continuous pressure loading across repeated dive cycles, not just for momentary submersion. The 800-cycle rated service life reflects the professional multi-season use case of AUV and ROV fleets that complete multiple dives per operating day across extended survey campaigns.<\/p>\n
For procurement engineers evaluating this battery for underwater vehicle OEM integration, research institution fleet supply, or defense contractor procurement, voltage, capacity, depth rating, connector type, and multi-pack parallel configuration are all available for OEM\/ODM customization.<\/p>","protected":false},"excerpt":{"rendered":"
Balder Power 25.2V \/ 4Ah \/ 7S1P NCM<\/strong> lithium thruster battery engineered for underwater drones, AUVs, ROVs, and multi-stage parallel underwater propulsion systems<\/p>\n<\/li>\n IP68 waterproof to 100 meters<\/strong> depth \u2014 pressure-rated for deep inspection, survey, and search operations<\/p>\n<\/li>\n 5C continuous discharge<\/strong> \u2014 delivers sustained high-current bursts for thruster acceleration and directional control in strong underwater currents<\/p>\n<\/li>\n 900g \/ 120\u00d784\u00d784mm compact form factor; 800-cycle service life; \u221220\u00b0C to +60\u00b0C operating range<\/p>\n<\/li>\n Factory direct wholesale, custom voltage \/ capacity \/ depth rating \/ OEM accepted<\/p>\n<\/li>\n<\/ul>","protected":false},"featured_media":13933,"template":"","meta":{"_acf_changed":false,"nf_dc_page":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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