Thanks for quick responses, really helpful!
Some quick comments:
Something is wrong in the second link, either the description or the photo is wrong because the battery in the picture says 500mAh on it, not 1,000.
My battery is printed with 1000mAh, so the image is wrong, lots of reuse on some sites, others have it correct. I simply googled the produt number. I have found a spec sheet here, this is from a Japanese vendor. I bought these batteries in Japan, so these are probably the correct details:
http://www.aska-elt.jp/products/up_img/1479280789-728432.pdfThe manufacturer of the new battery does not know one of the two important spec's for a battery. They say the voltage but do not say the important max protected output current which might not be enough for the amount of current your product needs.
Thanks for the tip re current. I found a more detailed spec sheet in the link above. Cannot see anything about max output current, just "Over discharge protection" for the voltage. However, having fitted the battery everything works OK, so I assume the output is enough for this handheld console.
Tomorrow I'll try to charge it, will make sure I protect the unit in case something goes wrong...
Thanks again, A