Anker SOLIX BP1000 Expansion Battery (1056Wh), LiFePO4 Batteries with 10-Year Lifespan, 1056Wh Extra Battery for Anker SOLIX C1000

I own 4 diffrent anker products and 1 expansion battery for my 767 battery , first you cannot charge the expansion battery from the 767 direct ,the 767 has to be fully charged before it will start to charge the main 767 ,so the person who left a feed back should do his research ,now to anker there customer service is no1 ,any problems they will sort it 2nd there products are no 1 in the world ,I owned an ecoflow was happing problems with it ,contacted them it took 7 days before I heard from them ,sent it back in the end ,I would recommend anker to anybody

Be warned. It's too much risk to buy this product at the moment as there is no support or way of making returns if / when something goes wrong. I own a Solix C1000 and was very happy with it and I also own a Powerhouse 555 which I use regularly. Getting the expansion battery for the C1000 seemed like a great idea to double the capacity.The item was partially charged when it arrived and it looked to do the job I needed perfectly. The one main initial downside that I found immediately and that the marketing pictures don't show though is the massive connective cable that adds 60% to the width that the unit takes up with the expansion battery stored on top. This was not ideal but I could live with it. I next tried to charge the expansion battery through my C1000 and hit the first issue. It wouldn't accept charge. The manual says to contact Anker support direct rather than the retails so I did. Anker said it was likely a firmware issue with my C1000 as the BP1000 was a new product. I stuck with them through several rounds of trial and error to get the battery to charge with the battery slowly depleting down to 0% and completely refused to accept any charge. Factory resets and various firmwares had no impact.Eventually Anker advised to return the battery to them but said I'd have to arrange and they'd refund me afterwards the courier cost and then send me a new unit. They advised not to use UPS but that any other company should be fine. This is a lie. I've tried every mainline courier and even some small delivery companies. No one will touch a battery over 100Wh that isn't brand new and being sent direct from the retailer. If it's a return and potentially faulty battery they just flat out refuse. I've tried everything but short of driving it myself to Wales I have no way of "returning" the item for the warranty claim. I asked Anker to arrange the courier collection direct as they obviously can ship out new items but they refused, stating "We regret to inform you that we currently face challenges in providing an effective shipping option in the UK." This is a massive issue.Also if anyone was thinking of not disclosing the contents of a parcel and risk sending a prohibited item (it did briefly cross my mind out of desperation) just be aware that if found out you will lose the item and are personally liable for any costs the courier can justify as damages for breaching their T&Cs and also costs for disposing of the item.I assume it will impact not just Anker but all other manufacturers as well, but it completely invalidates any of their warranty period claims as no used large capacity batteries (>100Wh) can be returned by any UK postal services. Anker claim 5 years on their products but I can't even get help when the item is faulty on arrival. I'm now seriously worried that if I have any issues with my other battery packs even within their warranty periods that they will basically be worthless and I also won't be able to get any support. Until there is a way to return batteries safely for warranty claims I'm afraid I'll be steering clear.