The recall of Hitachi doesn't run in the millions like the recall program from Dell, only 16,000 Flora 210W and SE210 notebooks that shipped to the Japanese market are affected.
Hitachi recalled the batteries as a precaution so that its customers could have the peace of mind that its laptops weren't in any risk of danger. By recalling the batteries early, Hitachi can get financial and logistical help from Sony on replacing the batteries and the company can hopefully stave off any potential fires by getting replacements in a timely fashion.