{"id":13965,"date":"2026-05-22T16:26:24","date_gmt":"2026-05-22T08:26:24","guid":{"rendered":"https:\/\/www.balderpower.com\/?post_type=product&p=13965"},"modified":"2026-05-22T21:51:03","modified_gmt":"2026-05-22T13:51:03","slug":"21v-10ah-ip68-waterproof-lithium-battery-pool-cleaning-robot-underwater-cleaner-fuse-protection","status":"publish","type":"product","link":"https:\/\/www.balderpower.com\/pt_br\/21v-10ah-ip68-waterproof-lithium-battery-pool-cleaning-robot-underwater-cleaner-fuse-protection\/","title":{"rendered":"21.6V 10.4Ah IP68 Waterproof Lithium Battery for Pool Cleaning Robots & Underwater Cleaning Equipment \u2014 Multi-Stage Waterproof"},"content":{"rendered":"

The Balder Power 21.6V 10.4Ah lithium battery pack is purpose-built for robotic pool cleaners, underwater hull cleaning robots, and submersible cleaning equipment platforms where the battery operates continuously in a fully submerged environment and safety under sustained water exposure is the primary design requirement.<\/p>\n

At 21.6V \/ 10.4Ah, this pack delivers 224.6Wh of energy through an 18650 cell architecture that prioritizes both runtime and safety in the confined, water-immersed conditions of pool robot battery bays. The 1C charge and discharge rate provides the measured, thermally controlled current profile appropriate for a battery that charges and discharges while submerged \u2014 avoiding the heat accumulation that higher-rate designs generate and that water immersion alone cannot adequately dissipate in a sealed enclosure.<\/p>\n

The IP68 multi-stage waterproof architecture is validated to 20\u201330 meters submersion depth. Unlike single-barrier enclosure designs that rely on one gasket compression seal as the sole defense against ingress, the multi-stage system uses sequential sealing layers \u2014 each independently tested \u2014 so that degradation of one barrier does not create a direct ingress path to the cell array. This architecture is specifically relevant for pool cleaning robots that complete hundreds of full submersion cycles per season, repeatedly transitioning between wet and dry conditions in chemical pool water environments that accelerate gasket degradation in single-barrier designs.<\/p>\n

The defining safety feature is cell-level fuse protection built into the 18650 cell array. Each individual cell contains an independent fuse element. If any single cell develops an internal short circuit \u2014 the primary failure mode in 18650 packs subjected to repeated mechanical vibration from cleaning robot drive systems \u2014 that cell’s fuse blows immediately, isolating the fault without propagating current through adjacent cells or triggering thermal runaway in the pack. This cell-level isolation is a meaningful safety advance over standard BMS-only protection, where a cell-level short must first drive enough current to trigger the BMS response before the fault is controlled. For pool cleaning equipment operating in occupied or near-occupied pool environments, this protection architecture provides an additional safety margin that standard portable battery packs do not offer.<\/p>","protected":false},"excerpt":{"rendered":"