Grundig ACC476 Battery from Sonnenschein Dryfit A508/3.5S for DIY conversion. The old battery is needed to reuse the two gray plastic parts for the new one. The new lead battery with 8 volts and 3500mAh is suitable for your Grundig shortwave radio Satellite 600, Satellite 650, Satellite ACC-476, International 650, and Professional 650. This battery serves as a replacement for your Grundig Dryfit Accumulator 476 battery. The new battery revitalizes your Grundig shortwave radio with a readiness of up to 21 hours. Also, rejuvenate your valuable shortwave radio with new power. The two gray plastic parts must be transferred from the old battery. The narrow front gray plastic part, for example, is attached to the new battery with double-sided tape. The top cover from the old battery can be reattached to the new battery using screws. Technical specifications: System PB lead battery, voltage 8.0 volts, capacity 3500mAh, dimensions (LxWxH) 178.5x34.1x60.5mm, weight 1000g. The Dryfit A508/3.5S specifications: The product superiority of Sonnenschein A500 batteries arises from the globally tested and successful Dryfit technology. Excellent energy storage properties combined with high reliability. Maintenance-free throughout the entire service life due to Sonnenschein Dryfit technology. 7 years design life at an ambient temperature of 20°C (80% remaining capacity). Grid plates made of lead-calcium alloy. Extremely low gas emissions due to internal gas recombination. Very low self-discharge rate, making it long-lasting. Short recharge times, deep discharge safe according to DIN 43 539 T5.